
      SUBROUTINE ZBESJ(ZR, ZI, FNU, KODE, N, CYR, CYI, NZ, IERR)
C***BEGIN PROLOGUE  ZBESJ
C***DATE WRITTEN   830501   (YYMMDD)
C***REVISION DATE  890801   (YYMMDD)
C***CATEGORY NO.  B5K
C***KEYWORDS  J-BESSEL FUNCTION,BESSEL FUNCTION OF COMPLEX ARGUMENT,
C             BESSEL FUNCTION OF FIRST KIND
C***AUTHOR  AMOS, DONALD E., SANDIA NATIONAL LABORATORIES
C***PURPOSE  TO COMPUTE THE J-BESSEL FUNCTION OF A COMPLEX ARGUMENT
C***DESCRIPTION
C
C                      ***A DOUBLE PRECISION ROUTINE***
C         ON KODE=1, CBESJ COMPUTES AN N MEMBER  SEQUENCE OF COMPLEX
C         BESSEL FUNCTIONS CY(I)=J(FNU+I-1,Z) FOR REAL, NONNEGATIVE
C         ORDERS FNU+I-1, I=1,...,N AND COMPLEX Z IN THE CUT PLANE
C         -PI.LT.ARG(Z).LE.PI. ON KODE=2, CBESJ RETURNS THE SCALED
C         FUNCTIONS
C
C         CY(I)=EXP(-ABS(Y))*J(FNU+I-1,Z)   I = 1,...,N , Y=AIMAG(Z)
C
C         WHICH REMOVE THE EXPONENTIAL GROWTH IN BOTH THE UPPER AND
C         LOWER HALF PLANES FOR Z TO INFINITY. DEFINITIONS AND NOTATION
C         ARE FOUND IN THE NBS HANDBOOK OF MATHEMATICAL FUNCTIONS
C         (REF. 1).
C
C         INPUT      ZR,ZI,FNU ARE DOUBLE PRECISION
C           ZR,ZI  - Z=CMPLX(ZR,ZI),  -PI.LT.ARG(Z).LE.PI
C           FNU    - ORDER OF INITIAL J FUNCTION, FNU.GE.0.0D0
C           KODE   - A PARAMETER TO INDICATE THE SCALING OPTION
C                    KODE= 1  RETURNS
C                             CY(I)=J(FNU+I-1,Z), I=1,...,N
C                        = 2  RETURNS
C                             CY(I)=J(FNU+I-1,Z)EXP(-ABS(Y)), I=1,...,N
C           N      - NUMBER OF MEMBERS OF THE SEQUENCE, N.GE.1
C
C         OUTPUT     CYR,CYI ARE DOUBLE PRECISION
C           CYR,CYI- DOUBLE PRECISION VECTORS WHOSE FIRST N COMPONENTS
C                    CONTAIN REAL AND IMAGINARY PARTS FOR THE SEQUENCE
C                    CY(I)=J(FNU+I-1,Z)  OR
C                    CY(I)=J(FNU+I-1,Z)EXP(-ABS(Y))  I=1,...,N
C                    DEPENDING ON KODE, Y=AIMAG(Z).
C           NZ     - NUMBER OF COMPONENTS SET TO ZERO DUE TO UNDERFLOW,
C                    NZ= 0   , NORMAL RETURN
C                    NZ.GT.0 , LAST NZ COMPONENTS OF CY SET  ZERO DUE
C                              TO UNDERFLOW, CY(I)=CMPLX(0.0D0,0.0D0),
C                              I = N-NZ+1,...,N
C           IERR   - ERROR FLAG
C                    IERR=0, NORMAL RETURN - COMPUTATION COMPLETED
C                    IERR=1, INPUT ERROR   - NO COMPUTATION
C                    IERR=2, OVERFLOW      - NO COMPUTATION, AIMAG(Z)
C                            TOO LARGE ON KODE=1
C                    IERR=3, CABS(Z) OR FNU+N-1 LARGE - COMPUTATION DONE
C                            BUT LOSSES OF SIGNIFCANCE BY ARGUMENT
C                            REDUCTION PRODUCE LESS THAN HALF OF MACHINE
C                            ACCURACY
C                    IERR=4, CABS(Z) OR FNU+N-1 TOO LARGE - NO COMPUTA-
C                            TION BECAUSE OF COMPLETE LOSSES OF SIGNIFI-
C                            CANCE BY ARGUMENT REDUCTION
C                    IERR=5, ERROR              - NO COMPUTATION,
C                            ALGORITHM TERMINATION CONDITION NOT MET
C
C***LONG DESCRIPTION
C
C         THE COMPUTATION IS CARRIED OUT BY THE FORMULA
C
C         J(FNU,Z)=EXP( FNU*PI*I/2)*I(FNU,-I*Z)    AIMAG(Z).GE.0.0
C
C         J(FNU,Z)=EXP(-FNU*PI*I/2)*I(FNU, I*Z)    AIMAG(Z).LT.0.0
C
C         WHERE I**2 = -1 AND I(FNU,Z) IS THE I BESSEL FUNCTION.
C
C         FOR NEGATIVE ORDERS,THE FORMULA
C
C              J(-FNU,Z) = J(FNU,Z)*COS(PI*FNU) - Y(FNU,Z)*SIN(PI*FNU)
C
C         CAN BE USED. HOWEVER,FOR LARGE ORDERS CLOSE TO INTEGERS, THE
C         THE FUNCTION CHANGES RADICALLY. WHEN FNU IS A LARGE POSITIVE
C         INTEGER,THE MAGNITUDE OF J(-FNU,Z)=J(FNU,Z)*COS(PI*FNU) IS A
C         LARGE NEGATIVE POWER OF TEN. BUT WHEN FNU IS NOT AN INTEGER,
C         Y(FNU,Z) DOMINATES IN MAGNITUDE WITH A LARGE POSITIVE POWER OF
C         TEN AND THE MOST THAT THE SECOND TERM CAN BE REDUCED IS BY
C         UNIT ROUNDOFF FROM THE COEFFICIENT. THUS, WIDE CHANGES CAN
C         OCCUR WITHIN UNIT ROUNDOFF OF A LARGE INTEGER FOR FNU. HERE,
C         LARGE MEANS FNU.GT.CABS(Z).
C
C         IN MOST COMPLEX VARIABLE COMPUTATION, ONE MUST EVALUATE ELE-
C         MENTARY FUNCTIONS. WHEN THE MAGNITUDE OF Z OR FNU+N-1 IS
C         LARGE, LOSSES OF SIGNIFICANCE BY ARGUMENT REDUCTION OCCUR.
C         CONSEQUENTLY, IF EITHER ONE EXCEEDS U1=SQRT(0.5/UR), THEN
C         LOSSES EXCEEDING HALF PRECISION ARE LIKELY AND AN ERROR FLAG
C         IERR=3 IS TRIGGERED WHERE UR=DMAX1(D1MACH(4),1.0D-18) IS
C         DOUBLE PRECISION UNIT ROUNDOFF LIMITED TO 18 DIGITS PRECISION.
C         IF EITHER IS LARGER THAN U2=0.5/UR, THEN ALL SIGNIFICANCE IS
C         LOST AND IERR=4. IN ORDER TO USE THE INT FUNCTION, ARGUMENTS
C         MUST BE FURTHER RESTRICTED NOT TO EXCEED THE LARGEST MACHINE
C         INTEGER, U3=I1MACH(9). THUS, THE MAGNITUDE OF Z AND FNU+N-1 IS
C         RESTRICTED BY MIN(U2,U3). ON 32 BIT MACHINES, U1,U2, AND U3
C         ARE APPROXIMATELY 2.0E+3, 4.2E+6, 2.1E+9 IN SINGLE PRECISION
C         ARITHMETIC AND 1.3E+8, 1.8E+16, 2.1E+9 IN DOUBLE PRECISION
C         ARITHMETIC RESPECTIVELY. THIS MAKES U2 AND U3 LIMITING IN
C         THEIR RESPECTIVE ARITHMETICS. THIS MEANS THAT ONE CAN EXPECT
C         TO RETAIN, IN THE WORST CASES ON 32 BIT MACHINES, NO DIGITS
C         IN SINGLE AND ONLY 7 DIGITS IN DOUBLE PRECISION ARITHMETIC.
C         SIMILAR CONSIDERATIONS HOLD FOR OTHER MACHINES.
C
C         THE APPROXIMATE RELATIVE ERROR IN THE MAGNITUDE OF A COMPLEX
C         BESSEL FUNCTION CAN BE EXPRESSED BY P*10**S WHERE P=MAX(UNIT
C         ROUNDOFF,1.0E-18) IS THE NOMINAL PRECISION AND 10**S REPRE-
C         SENTS THE INCREASE IN ERROR DUE TO ARGUMENT REDUCTION IN THE
C         ELEMENTARY FUNCTIONS. HERE, S=MAX(1,ABS(LOG10(CABS(Z))),
C         ABS(LOG10(FNU))) APPROXIMATELY (I.E. S=MAX(1,ABS(EXPONENT OF
C         CABS(Z),ABS(EXPONENT OF FNU)) ). HOWEVER, THE PHASE ANGLE MAY
C         HAVE ONLY ABSOLUTE ACCURACY. THIS IS MOST LIKELY TO OCCUR WHEN
C         ONE COMPONENT (IN ABSOLUTE VALUE) IS LARGER THAN THE OTHER BY
C         SEVERAL ORDERS OF MAGNITUDE. IF ONE COMPONENT IS 10**K LARGER
C         THAN THE OTHER, THEN ONE CAN EXPECT ONLY MAX(ABS(LOG10(P))-K,
C         0) SIGNIFICANT DIGITS; OR, STATED ANOTHER WAY, WHEN K EXCEEDS
C         THE EXPONENT OF P, NO SIGNIFICANT DIGITS REMAIN IN THE SMALLER
C         COMPONENT. HOWEVER, THE PHASE ANGLE RETAINS ABSOLUTE ACCURACY
C         BECAUSE, IN COMPLEX ARITHMETIC WITH PRECISION P, THE SMALLER
C         COMPONENT WILL NOT (AS A RULE) DECREASE BELOW P TIMES THE
C         MAGNITUDE OF THE LARGER COMPONENT. IN THESE EXTREME CASES,
C         THE PRINCIPAL PHASE ANGLE IS ON THE ORDER OF +P, -P, PI/2-P,
C         OR -PI/2+P.
C
C***REFERENCES  HANDBOOK OF MATHEMATICAL FUNCTIONS BY M. ABRAMOWITZ
C                 AND I. A. STEGUN, NBS AMS SERIES 55, U.S. DEPT. OF
C                 COMMERCE, 1955.
C
C               COMPUTATION OF BESSEL FUNCTIONS OF COMPLEX ARGUMENT
C                 BY D. E. AMOS, SAND83-0083, MAY, 1983.1
C
C               COMPUTATION OF BESSEL FUNCTIONS OF COMPLEX ARGUMENT
C                 AND LARGE ORDER BY D. E. AMOS, SAND83-0643, MAY, 1983
C
C               A SUBROUTINE PACKAGE FOR BESSEL FUNCTIONS OF A COMPLEX
C                 ARGUMENT AND NONNEGATIVE ORDER BY D. E. AMOS, SAND85-
C                 1018, MAY, 1985
C
C               A PORTABLE PACKAGE FOR BESSEL FUNCTIONS OF A COMPLEX
C                 ARGUMENT AND NONNEGATIVE ORDER BY D. E. AMOS, TRANS.
C                 MATH. SOFTWARE, 1986
C
C***ROUTINES CALLED  ZBINU,I1MACH,D1MACH
C***END PROLOGUE  ZBESJ
C
C     COMPLEX CI,CSGN,CY,Z,ZN
      DOUBLE PRECISION AA, ALIM, ARG, CII, CSGNI, CSGNR, CYI, CYR, DIG,
     * ELIM, FNU, FNUL, HPI, RL, R1M5, STR, TOL, ZI, ZNI, ZNR, ZR,
     * D1MACH, BB, FN, AZ, AZABS, ASCLE, RTOL, ATOL, STI
      INTEGER I, IERR, INU, INUH, IR, K, KODE, K1, K2, N, NL, NZ, I1MACH
      DIMENSION CYR(N), CYI(N)
      DATA HPI /1.57079632679489662D0/
C
C***FIRST EXECUTABLE STATEMENT  ZBESJ
      IERR = 0
      NZ=0
      IF (FNU.LT.0.0D0) IERR=1
      IF (KODE.LT.1 .OR. KODE.GT.2) IERR=1
      IF (N.LT.1) IERR=1
      IF (IERR.NE.0) RETURN
C-----------------------------------------------------------------------
C     SET PARAMETERS RELATED TO MACHINE CONSTANTS.
C     TOL IS THE APPROXIMATE UNIT ROUNDOFF LIMITED TO 1.0E-18.
C     ELIM IS THE APPROXIMATE EXPONENTIAL OVER- AND UNDERFLOW LIMIT.
C     EXP(-ELIM).LT.EXP(-ALIM)=EXP(-ELIM)/TOL    AND
C     EXP(ELIM).GT.EXP(ALIM)=EXP(ELIM)*TOL       ARE INTERVALS NEAR
C     UNDERFLOW AND OVERFLOW LIMITS WHERE SCALED ARITHMETIC IS DONE.
C     RL IS THE LOWER BOUNDARY OF THE ASYMPTOTIC EXPANSION FOR LARGE Z.
C     DIG = NUMBER OF BASE 10 DIGITS IN TOL = 10**(-DIG).
C     FNUL IS THE LOWER BOUNDARY OF THE ASYMPTOTIC SERIES FOR LARGE FNU.
C-----------------------------------------------------------------------
      TOL = DMAX1(D1MACH(4),1.0D-18)
      K1 = I1MACH(15)
      K2 = I1MACH(16)
      R1M5 = D1MACH(5)
      K = MIN0(IABS(K1),IABS(K2))
      ELIM = 2.303D0*(DBLE(FLOAT(K))*R1M5-3.0D0)
      K1 = I1MACH(14) - 1
      AA = R1M5*DBLE(FLOAT(K1))
      DIG = DMIN1(AA,18.0D0)
      AA = AA*2.303D0
      ALIM = ELIM + DMAX1(-AA,-41.45D0)
      RL = 1.2D0*DIG + 3.0D0
      FNUL = 10.0D0 + 6.0D0*(DIG-3.0D0)
C-----------------------------------------------------------------------
C     TEST FOR PROPER RANGE
C-----------------------------------------------------------------------
      AZ = AZABS(ZR,ZI)
      FN = FNU+DBLE(FLOAT(N-1))
      AA = 0.5D0/TOL
      BB=DBLE(FLOAT(I1MACH(9)))*0.5D0
      AA = DMIN1(AA,BB)
      IF (AZ.GT.AA) GO TO 260
      IF (FN.GT.AA) GO TO 260
      AA = DSQRT(AA)
      IF (AZ.GT.AA) IERR=3
      IF (FN.GT.AA) IERR=3
C-----------------------------------------------------------------------
C     CALCULATE CSGN=EXP(FNU*HPI*I) TO MINIMIZE LOSSES OF SIGNIFICANCE
C     WHEN FNU IS LARGE
C-----------------------------------------------------------------------
      CII = 1.0D0
      INU = INT(SNGL(FNU))
      INUH = INU/2
      IR = INU - 2*INUH
      ARG = (FNU-DBLE(FLOAT(INU-IR)))*HPI
      CSGNR = DCOS(ARG)
      CSGNI = DSIN(ARG)
      IF (MOD(INUH,2).EQ.0) GO TO 40
      CSGNR = -CSGNR
      CSGNI = -CSGNI
   40 CONTINUE
C-----------------------------------------------------------------------
C     ZN IS IN THE RIGHT HALF PLANE
C-----------------------------------------------------------------------
      ZNR = ZI
      ZNI = -ZR
      IF (ZI.GE.0.0D0) GO TO 50
      ZNR = -ZNR
      ZNI = -ZNI
      CSGNI = -CSGNI
      CII = -CII
   50 CONTINUE
      CALL ZBINU(ZNR, ZNI, FNU, KODE, N, CYR, CYI, NZ, RL, FNUL, TOL,
     * ELIM, ALIM)
      IF (NZ.LT.0) GO TO 130
      NL = N - NZ
      IF (NL.EQ.0) RETURN
      RTOL = 1.0D0/TOL
      ASCLE = D1MACH(1)*RTOL*1.0D+3
      DO 60 I=1,NL
C       STR = CYR(I)*CSGNR - CYI(I)*CSGNI
C       CYI(I) = CYR(I)*CSGNI + CYI(I)*CSGNR
C       CYR(I) = STR
        AA = CYR(I)
        BB = CYI(I)
        ATOL = 1.0D0
        IF (DMAX1(DABS(AA),DABS(BB)).GT.ASCLE) GO TO 55
          AA = AA*RTOL
          BB = BB*RTOL
          ATOL = TOL
   55   CONTINUE
        STR = AA*CSGNR - BB*CSGNI
        STI = AA*CSGNI + BB*CSGNR
        CYR(I) = STR*ATOL
        CYI(I) = STI*ATOL
        STR = -CSGNI*CII
        CSGNI = CSGNR*CII
        CSGNR = STR
   60 CONTINUE
      RETURN
  130 CONTINUE
      IF(NZ.EQ.(-2)) GO TO 140
      NZ = 0
      IERR = 2
      RETURN
  140 CONTINUE
      NZ=0
      IERR=5
      RETURN
  260 CONTINUE
      NZ=0
      IERR=4
      RETURN
      END
*DECK D1MACH
      DOUBLE PRECISION FUNCTION D1MACH(I)
C***BEGIN PROLOGUE  D1MACH
C***DATE WRITTEN   750101   (YYMMDD)
C***REVISION DATE  890213   (YYMMDD)
C***CATEGORY NO.  R1
C***KEYWORDS  LIBRARY=SLATEC,TYPE=DOUBLE PRECISION(R1MACH-S D1MACH-D),
C             MACHINE CONSTANTS
C***AUTHOR  FOX, P. A., (BELL LABS)
C           HALL, A. D., (BELL LABS)
C           SCHRYER, N. L., (BELL LABS)
C***PURPOSE  Returns double precision machine dependent constants
C***DESCRIPTION
C
C   D1MACH can be used to obtain machine-dependent parameters
C   for the local machine environment.  It is a function
C   subprogram with one (input) argument, and can be called
C   as follows, for example
C
C        D = D1MACH(I)
C
C   where I=1,...,5.  The (output) value of D above is
C   determined by the (input) value of I.  The results for
C   various values of I are discussed below.
C
C   D1MACH( 1) = B**(EMIN-1), the smallest positive magnitude.
C   D1MACH( 2) = B**EMAX*(1 - B**(-T)), the largest magnitude.
C   D1MACH( 3) = B**(-T), the smallest relative spacing.
C   D1MACH( 4) = B**(1-T), the largest relative spacing.
C   D1MACH( 5) = LOG10(B)
C
C   Assume double precision numbers are represented in the T-digit,
C   base-B form
C
C              sign (B**E)*( (X(1)/B) + ... + (X(T)/B**T) )
C
C   where 0 .LE. X(I) .LT. B for I=1,...,T, 0 .LT. X(1), and
C   EMIN .LE. E .LE. EMAX.
C
C   The values of B, T, EMIN and EMAX are provided in I1MACH as
C   follows:
C   I1MACH(10) = B, the base.
C   I1MACH(14) = T, the number of base-B digits.
C   I1MACH(15) = EMIN, the smallest exponent E.
C   I1MACH(16) = EMAX, the largest exponent E.
C
C   To alter this function for a particular environment,
C   the desired set of DATA statements should be activated by
C   removing the C from column 1.  Also, the values of
C   D1MACH(1) - D1MACH(4) should be checked for consistency
C   with the local operating system.
C
C***REFERENCES  FOX P.A., HALL A.D., SCHRYER N.L.,*FRAMEWORK FOR A
C                 PORTABLE LIBRARY*, ACM TRANSACTIONS ON MATHEMATICAL
C                 SOFTWARE, VOL. 4, NO. 2, JUNE 1978, PP. 177-188.
C***ROUTINES CALLED  XERROR
C***END PROLOGUE  D1MACH
C
      INTEGER SMALL(4)
      INTEGER LARGE(4)
      INTEGER RIGHT(4)
      INTEGER DIVER(4)
      INTEGER LOG10(4)
C
      DOUBLE PRECISION DMACH(5)
      SAVE DMACH
C
      EQUIVALENCE (DMACH(1),SMALL(1))
      EQUIVALENCE (DMACH(2),LARGE(1))
      EQUIVALENCE (DMACH(3),RIGHT(1))
      EQUIVALENCE (DMACH(4),DIVER(1))
      EQUIVALENCE (DMACH(5),LOG10(1))
C
C     MACHINE CONSTANTS FOR THE AMIGA
C     ABSOFT FORTRAN COMPILER USING THE 68020/68881 COMPILER OPTION
C
C     DATA SMALL(1), SMALL(2) / Z'00100000', Z'00000000' /
C     DATA LARGE(1), LARGE(2) / Z'7FEFFFFF', Z'FFFFFFFF' /
C     DATA RIGHT(1), RIGHT(2) / Z'3CA00000', Z'00000000' /
C     DATA DIVER(1), DIVER(2) / Z'3CB00000', Z'00000000' /
C     DATA LOG10(1), LOG10(2) / Z'3FD34413', Z'509F79FF' /
C
C     MACHINE CONSTANTS FOR THE AMIGA
C     ABSOFT FORTRAN COMPILER USING SOFTWARE FLOATING POINT
C
C     DATA SMALL(1), SMALL(2) / Z'00100000', Z'00000000' /
C     DATA LARGE(1), LARGE(2) / Z'7FDFFFFF', Z'FFFFFFFF' /
C     DATA RIGHT(1), RIGHT(2) / Z'3CA00000', Z'00000000' /
C     DATA DIVER(1), DIVER(2) / Z'3CB00000', Z'00000000' /
C     DATA LOG10(1), LOG10(2) / Z'3FD34413', Z'509F79FF' /
C
C     MACHINE CONSTANTS FOR THE APOLLO
C
C     DATA SMALL(1), SMALL(2) / 16#00100000, 16#00000000 /
C     DATA LARGE(1), LARGE(2) / 16#7FFFFFFF, 16#FFFFFFFF /
C     DATA RIGHT(1), RIGHT(2) / 16#3CA00000, 16#00000000 /
C     DATA DIVER(1), DIVER(2) / 16#3CB00000, 16#00000000 /
C     DATA LOG10(1), LOG10(2) / 16#3FD34413, 16#509F79FF /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 1700 SYSTEM
C
C     DATA SMALL(1) / ZC00800000 /
C     DATA SMALL(2) / Z000000000 /
C     DATA LARGE(1) / ZDFFFFFFFF /
C     DATA LARGE(2) / ZFFFFFFFFF /
C     DATA RIGHT(1) / ZCC5800000 /
C     DATA RIGHT(2) / Z000000000 /
C     DATA DIVER(1) / ZCC6800000 /
C     DATA DIVER(2) / Z000000000 /
C     DATA LOG10(1) / ZD00E730E7 /
C     DATA LOG10(2) / ZC77800DC0 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 5700 SYSTEM
C
C     DATA SMALL(1) / O1771000000000000 /
C     DATA SMALL(2) / O0000000000000000 /
C     DATA LARGE(1) / O0777777777777777 /
C     DATA LARGE(2) / O0007777777777777 /
C     DATA RIGHT(1) / O1461000000000000 /
C     DATA RIGHT(2) / O0000000000000000 /
C     DATA DIVER(1) / O1451000000000000 /
C     DATA DIVER(2) / O0000000000000000 /
C     DATA LOG10(1) / O1157163034761674 /
C     DATA LOG10(2) / O0006677466732724 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 6700/7700 SYSTEMS
C
C     DATA SMALL(1) / O1771000000000000 /
C     DATA SMALL(2) / O7770000000000000 /
C     DATA LARGE(1) / O0777777777777777 /
C     DATA LARGE(2) / O7777777777777777 /
C     DATA RIGHT(1) / O1461000000000000 /
C     DATA RIGHT(2) / O0000000000000000 /
C     DATA DIVER(1) / O1451000000000000 /
C     DATA DIVER(2) / O0000000000000000 /
C     DATA LOG10(1) / O1157163034761674 /
C     DATA LOG10(2) / O0006677466732724 /
C
C     MACHINE CONSTANTS FOR THE CDC 170/180 SERIES USING NOS/VE
C
C     DATA SMALL(1) / Z"3001800000000000" /
C     DATA SMALL(2) / Z"3001000000000000" /
C     DATA LARGE(1) / Z"4FFEFFFFFFFFFFFE" /
C     DATA LARGE(2) / Z"4FFE000000000000" /
C     DATA RIGHT(1) / Z"3FD2800000000000" /
C     DATA RIGHT(2) / Z"3FD2000000000000" /
C     DATA DIVER(1) / Z"3FD3800000000000" /
C     DATA DIVER(2) / Z"3FD3000000000000" /
C     DATA LOG10(1) / Z"3FFF9A209A84FBCF" /
C     DATA LOG10(2) / Z"3FFFF7988F8959AC" /
C
C     MACHINE CONSTANTS FOR THE CDC 6000/7000 SERIES
C
C     DATA SMALL(1) / 00564000000000000000B /
C     DATA SMALL(2) / 00000000000000000000B /
C     DATA LARGE(1) / 37757777777777777777B /
C     DATA LARGE(2) / 37157777777777777777B /
C     DATA RIGHT(1) / 15624000000000000000B /
C     DATA RIGHT(2) / 00000000000000000000B /
C     DATA DIVER(1) / 15634000000000000000B /
C     DATA DIVER(2) / 00000000000000000000B /
C     DATA LOG10(1) / 17164642023241175717B /
C     DATA LOG10(2) / 16367571421742254654B /
C
C     MACHINE CONSTANTS FOR THE CELERITY C1260
C
C     DATA SMALL(1), SMALL(2) / Z'00100000', Z'00000000' /
C     DATA LARGE(1), LARGE(2) / Z'7FEFFFFF', Z'FFFFFFFF' /
C     DATA RIGHT(1), RIGHT(2) / Z'3CA00000', Z'00000000' /
C     DATA DIVER(1), DIVER(2) / Z'3CB00000', Z'00000000' /
C     DATA LOG10(1), LOG10(2) / Z'3FD34413', Z'509F79FF' /
C
C     MACHINE CONSTANTS FOR THE CONVEX C-1
C
C     DATA SMALL(1), SMALL(2) / '00100000'X,'00000000'X /
C     DATA LARGE(1), LARGE(2) / '7FFFFFFF'X,'FFFFFFFF'X /
C     DATA RIGHT(1), RIGHT(2) / '3CC00000'X,'00000000'X /
C     DATA DIVER(1), DIVER(2) / '3CD00000'X,'00000000'X /
C     DATA LOG10(1), LOG10(2) / '3FF34413'X,'509F79FF'X /
C
C     MACHINE CONSTANTS FOR THE CRAY-1
C
C     DATA SMALL(1) / 201354000000000000000B /
C     DATA SMALL(2) / 000000000000000000000B /
C     DATA LARGE(1) / 577767777777777777777B /
C     DATA LARGE(2) / 000007777777777777774B /
C     DATA RIGHT(1) / 376434000000000000000B /
C     DATA RIGHT(2) / 000000000000000000000B /
C     DATA DIVER(1) / 376444000000000000000B /
C     DATA DIVER(2) / 000000000000000000000B /
C     DATA LOG10(1) / 377774642023241175717B /
C     DATA LOG10(2) / 000007571421742254654B /
C
C     MACHINE CONSTANTS FOR THE DATA GENERAL ECLIPSE S/200
C
C     NOTE - IT MAY BE APPROPRIATE TO INCLUDE THE FOLLOWING CARD -
C     STATIC DMACH(5)
C
C     DATA SMALL /    20K, 3*0 /
C     DATA LARGE / 77777K, 3*177777K /
C     DATA RIGHT / 31420K, 3*0 /
C     DATA DIVER / 32020K, 3*0 /
C     DATA LOG10 / 40423K, 42023K, 50237K, 74776K /
C
C     MACHINE CONSTANTS FOR THE ELXSI 6400
C     (ASSUMING REAL*8 IS THE DEFAULT DOUBLE PRECISION)
C
C     DATA SMALL(1), SMALL(2) / '00100000'X,'00000000'X /
C     DATA LARGE(1), LARGE(2) / '7FEFFFFF'X,'FFFFFFFF'X /
C     DATA RIGHT(1), RIGHT(2) / '3CB00000'X,'00000000'X /
C     DATA DIVER(1), DIVER(2) / '3CC00000'X,'00000000'X /
C     DATA LOG10(1), LOG10(2) / '3FD34413'X,'509F79FF'X /
C
C     MACHINE CONSTANTS FOR THE HARRIS 220
C
C     DATA SMALL(1), SMALL(2) / '20000000, '00000201 /
C     DATA LARGE(1), LARGE(2) / '37777777, '37777577 /
C     DATA RIGHT(1), RIGHT(2) / '20000000, '00000333 /
C     DATA DIVER(1), DIVER(2) / '20000000, '00000334 /
C     DATA LOG10(1), LOG10(2) / '23210115, '10237777 /
C
C     MACHINE CONSTANTS FOR THE HONEYWELL 600/6000 SERIES
C
C     DATA SMALL(1), SMALL(2) / O402400000000, O000000000000 /
C     DATA LARGE(1), LARGE(2) / O376777777777, O777777777777 /
C     DATA RIGHT(1), RIGHT(2) / O604400000000, O000000000000 /
C     DATA DIVER(1), DIVER(2) / O606400000000, O000000000000 /
C     DATA LOG10(1), LOG10(2) / O776464202324, O117571775714 /
C
C     MACHINE CONSTANTS FOR THE HP 2100
C     THREE WORD DOUBLE PRECISION OPTION WITH FTN4
C
C     DATA SMALL(1), SMALL(2), SMALL(3) / 40000B,       0,       1 /
C     DATA LARGE(1), LARGE(2), LARGE(3) / 77777B, 177777B, 177776B /
C     DATA RIGHT(1), RIGHT(2), RIGHT(3) / 40000B,       0,    265B /
C     DATA DIVER(1), DIVER(2), DIVER(3) / 40000B,       0,    276B /
C     DATA LOG10(1), LOG10(2), LOG10(3) / 46420B,  46502B,  77777B /
C
C     MACHINE CONSTANTS FOR THE HP 2100
C     FOUR WORD DOUBLE PRECISION OPTION WITH FTN4
C
C     DATA SMALL(1), SMALL(2) /  40000B,       0 /
C     DATA SMALL(3), SMALL(4) /       0,       1 /
C     DATA LARGE(1), LARGE(2) /  77777B, 177777B /
C     DATA LARGE(3), LARGE(4) / 177777B, 177776B /
C     DATA RIGHT(1), RIGHT(2) /  40000B,       0 /
C     DATA RIGHT(3), RIGHT(4) /       0,    225B /
C     DATA DIVER(1), DIVER(2) /  40000B,       0 /
C     DATA DIVER(3), DIVER(4) /       0,    227B /
C     DATA LOG10(1), LOG10(2) /  46420B,  46502B /
C     DATA LOG10(3), LOG10(4) /  76747B, 176377B /
C
C     MACHINE CONSTANTS FOR THE HP 9000
C
C     DATA SMALL(1), SMALL(2) / 00040000000B, 00000000000B /
C     DATA LARGE(1), LARGE(2) / 17737777777B, 37777777777B /
C     DATA RIGHT(1), RIGHT(2) / 07454000000B, 00000000000B /
C     DATA DIVER(1), DIVER(2) / 07460000000B, 00000000000B /
C     DATA LOG10(1), LOG10(2) / 07764642023B, 12047674777B /
C
C     MACHINE CONSTANTS FOR THE IBM 360/370 SERIES,
C     THE XEROX SIGMA 5/7/9, THE SEL SYSTEMS 85/86, AND
C     THE PERKIN ELMER (INTERDATA) 7/32.
C
C     DATA SMALL(1), SMALL(2) / Z00100000, Z00000000 /
C     DATA LARGE(1), LARGE(2) / Z7FFFFFFF, ZFFFFFFFF /
C     DATA RIGHT(1), RIGHT(2) / Z33100000, Z00000000 /
C     DATA DIVER(1), DIVER(2) / Z34100000, Z00000000 /
C     DATA LOG10(1), LOG10(2) / Z41134413, Z509F79FF /
C
C     MACHINE CONSTANTS FOR THE IBM PC
C     ASSUMES THAT ALL ARITHMETIC IS DONE IN DOUBLE PRECISION
C     ON 8088, I.E., NOT IN 80 BIT FORM FOR THE 8087.
C
C     DATA SMALL(1),SMALL(2) /  2002288515,    1050897 /
C     DATA LARGE(1),LARGE(2) /  1487780761, 2146426097 /
C     DATA RIGHT(1),RIGHT(2) / -1209488034, 1017118298 /
C     DATA DIVER(1),DIVER(2) / -1209488034, 1018166874 /
C     DATA LOG10(1),LOG10(2) /  1352628735, 1070810131 /
C
C     MACHINE CONSTANTS FOR THE IBM RS 6000
C
C     DATA SMALL(1), SMALL(2) / Z'00100000', Z'00000000' /
C     DATA LARGE(1), LARGE(2) / Z'7FEFFFFF', Z'FFFFFFFF' /
C     DATA RIGHT(1), RIGHT(2) / Z'3CA00000', Z'00000000' /
C     DATA DIVER(1), DIVER(2) / Z'3CB00000', Z'00000000' /
C     DATA LOG10(1), LOG10(2) / Z'3FD34413', Z'509F79FF' /
C
C     MACHINE CONSTANTS FOR THE PDP-10 (KA PROCESSOR)
C
C     DATA SMALL(1), SMALL(2) / "033400000000, "000000000000 /
C     DATA LARGE(1), LARGE(2) / "377777777777, "344777777777 /
C     DATA RIGHT(1), RIGHT(2) / "113400000000, "000000000000 /
C     DATA DIVER(1), DIVER(2) / "114400000000, "000000000000 /
C     DATA LOG10(1), LOG10(2) / "177464202324, "144117571776 /
C
C     MACHINE CONSTANTS FOR THE PDP-10 (KI PROCESSOR)
C
C     DATA SMALL(1), SMALL(2) / "000400000000, "000000000000 /
C     DATA LARGE(1), LARGE(2) / "377777777777, "377777777777 /
C     DATA RIGHT(1), RIGHT(2) / "103400000000, "000000000000 /
C     DATA DIVER(1), DIVER(2) / "104400000000, "000000000000 /
C     DATA LOG10(1), LOG10(2) / "177464202324, "476747767461 /
C
C     MACHINE CONSTANTS FOR PDP-11 FORTRAN SUPPORTING
C     32-BIT INTEGERS (EXPRESSED IN INTEGER AND OCTAL).
C
C     DATA SMALL(1), SMALL(2) /    8388608,           0 /
C     DATA LARGE(1), LARGE(2) / 2147483647,          -1 /
C     DATA RIGHT(1), RIGHT(2) /  612368384,           0 /
C     DATA DIVER(1), DIVER(2) /  620756992,           0 /
C     DATA LOG10(1), LOG10(2) / 1067065498, -2063872008 /
C
C     DATA SMALL(1), SMALL(2) / O00040000000, O00000000000 /
C     DATA LARGE(1), LARGE(2) / O17777777777, O37777777777 /
C     DATA RIGHT(1), RIGHT(2) / O04440000000, O00000000000 /
C     DATA DIVER(1), DIVER(2) / O04500000000, O00000000000 /
C     DATA LOG10(1), LOG10(2) / O07746420232, O20476747770 /
C
C     MACHINE CONSTANTS FOR PDP-11 FORTRAN SUPPORTING
C     16-BIT INTEGERS (EXPRESSED IN INTEGER AND OCTAL).
C
C     DATA SMALL(1), SMALL(2) /    128,      0 /
C     DATA SMALL(3), SMALL(4) /      0,      0 /
C     DATA LARGE(1), LARGE(2) /  32767,     -1 /
C     DATA LARGE(3), LARGE(4) /     -1,     -1 /
C     DATA RIGHT(1), RIGHT(2) /   9344,      0 /
C     DATA RIGHT(3), RIGHT(4) /      0,      0 /
C     DATA DIVER(1), DIVER(2) /   9472,      0 /
C     DATA DIVER(3), DIVER(4) /      0,      0 /
C     DATA LOG10(1), LOG10(2) /  16282,   8346 /
C     DATA LOG10(3), LOG10(4) / -31493, -12296 /
C
C     DATA SMALL(1), SMALL(2) / O000200, O000000 /
C     DATA SMALL(3), SMALL(4) / O000000, O000000 /
C     DATA LARGE(1), LARGE(2) / O077777, O177777 /
C     DATA LARGE(3), LARGE(4) / O177777, O177777 /
C     DATA RIGHT(1), RIGHT(2) / O022200, O000000 /
C     DATA RIGHT(3), RIGHT(4) / O000000, O000000 /
C     DATA DIVER(1), DIVER(2) / O022400, O000000 /
C     DATA DIVER(3), DIVER(4) / O000000, O000000 /
C     DATA LOG10(1), LOG10(2) / O037632, O020232 /
C     DATA LOG10(3), LOG10(4) / O102373, O147770 /
C
C     MACHINE CONSTANTS FOR THE SILICON GRAPHICS IRIS
C
      data dmach(1) / 2.22507 38585 072012 d-308 /
      data dmach(2) / 1.79769 31348 623158 d+308 /
      data dmach(3) / 2.22044 60492 503131 d-16  /
      data dmach(4) / 4.44089 20985 006262 d-16  /
      data dmach(5) / 0.30102 99956 639812       /
C
c      DATA SMALL(1), SMALL(2) / Z'00100000',Z'00000000' /
c      DATA LARGE(1), LARGE(2) / Z'7FEFFFFF',Z'FFFFFFFF' /
c      DATA RIGHT(1), RIGHT(2) / Z'3CB00000',Z'00000000' /
c      DATA DIVER(1), DIVER(2) / Z'3CC00000',Z'00000000' /
c      DATA LOG10(1), LOG10(2) / Z'3FD34413',Z'509F79FF' /
C
C     MACHINE CONSTANTS FOR THE SUN
C
C     from SLATEC CML committee - work for Sun3, Sun4, and Sparc
C
C     DATA SMALL(1), SMALL(2) / Z'00100000', Z'00000000' /
C     DATA LARGE(1), LARGE(2) / Z'7FEFFFFF', Z'FFFFFFFF' /
C     DATA RIGHT(1), RIGHT(2) / Z'3CA00000', Z'00000000' /
C     DATA DIVER(1), DIVER(2) / Z'3CB00000', Z'00000000' /
C     DATA LOG10(1), LOG10(2) / Z'3FD34413', Z'509F79FF' /
C
C     from Sun Microsystems - work for Sun 386i
C
C     DATA SMALL(1), SMALL(2) / Z'00000000', Z'00100000' /
C     DATA LARGE(1), LARGE(2) / Z'FFFFFFFF', Z'7FEFFFFF' /
C     DATA RIGHT(1), RIGHT(2) / Z'00000000', Z'3CA00000' /
C     DATA DIVER(1), DIVER(2) / Z'00000000', Z'3CB00000' /
C     DATA LOG10(1), LOG10(2) / Z'509F79FF', Z'3FD34413' /
C
C     MACHINE CONSTANTS FOR THE UNIVAC 1100 SERIES FTN COMPILER
C
C     DATA SMALL(1), SMALL(2) / O000040000000, O000000000000 /
C     DATA LARGE(1), LARGE(2) / O377777777777, O777777777777 /
C     DATA RIGHT(1), RIGHT(2) / O170540000000, O000000000000 /
C     DATA DIVER(1), DIVER(2) / O170640000000, O000000000000 /
C     DATA LOG10(1), LOG10(2) / O177746420232, O411757177572 /
C
C     MACHINE CONSTANTS FOR VAX 11/780
C     (EXPRESSED IN INTEGER AND HEXADECIMAL)
C     THE HEX FORMAT BELOW MAY NOT BE SUITABLE FOR UNIX SYSYEMS
C     THE INTEGER FORMAT SHOULD BE OK FOR UNIX SYSTEMS
C
C     DATA SMALL(1), SMALL(2) /        128,           0 /
C     DATA LARGE(1), LARGE(2) /     -32769,          -1 /
C     DATA RIGHT(1), RIGHT(2) /       9344,           0 /
C     DATA DIVER(1), DIVER(2) /       9472,           0 /
C     DATA LOG10(1), LOG10(2) /  546979738,  -805796613 /
C
C     DATA SMALL(1), SMALL(2) / Z00000080, Z00000000 /
C     DATA LARGE(1), LARGE(2) / ZFFFF7FFF, ZFFFFFFFF /
C     DATA RIGHT(1), RIGHT(2) / Z00002480, Z00000000 /
C     DATA DIVER(1), DIVER(2) / Z00002500, Z00000000 /
C     DATA LOG10(1), LOG10(2) / Z209A3F9A, ZCFF884FB /
C
C     MACHINE CONSTANTS FOR VAX 11/780 (G-FLOATING)
C     (EXPRESSED IN INTEGER AND HEXADECIMAL)
C     THE HEX FORMAT BELOW MAY NOT BE SUITABLE FOR UNIX SYSYEMS
C     THE INTEGER FORMAT SHOULD BE OK FOR UNIX SYSTEMS
C
C     DATA SMALL(1), SMALL(2) /         16,           0 /
C     DATA LARGE(1), LARGE(2) /     -32769,          -1 /
C     DATA RIGHT(1), RIGHT(2) /      15552,           0 /
C     DATA DIVER(1), DIVER(2) /      15568,           0 /
C     DATA LOG10(1), LOG10(2) /  1142112243, 2046775455 /
C
C     DATA SMALL(1), SMALL(2) / Z00000010, Z00000000 /
C     DATA LARGE(1), LARGE(2) / ZFFFF7FFF, ZFFFFFFFF /
C     DATA RIGHT(1), RIGHT(2) / Z00003CC0, Z00000000 /
C     DATA DIVER(1), DIVER(2) / Z00003CD0, Z00000000 /
C     DATA LOG10(1), LOG10(2) / Z44133FF3, Z79FF509F /
C
C
C***FIRST EXECUTABLE STATEMENT  D1MACH
      IF (I .LT. 1  .OR.  I .GT. 5)
     1   CALL XERROR ('D1MACH -- I OUT OF BOUNDS', 25, 1, 2)
C
      D1MACH = DMACH(I)
      RETURN
C
      END
      DOUBLE PRECISION FUNCTION DGAMLN(Z,IERR)
C***BEGIN PROLOGUE  DGAMLN
C***DATE WRITTEN   830501   (YYMMDD)
C***REVISION DATE  830501   (YYMMDD)
C***CATEGORY NO.  B5F
C***KEYWORDS  GAMMA FUNCTION,LOGARITHM OF GAMMA FUNCTION
C***AUTHOR  AMOS, DONALD E., SANDIA NATIONAL LABORATORIES
C***PURPOSE  TO COMPUTE THE LOGARITHM OF THE GAMMA FUNCTION
C***DESCRIPTION
C
C               **** A DOUBLE PRECISION ROUTINE ****
C         DGAMLN COMPUTES THE NATURAL LOG OF THE GAMMA FUNCTION FOR
C         Z.GT.0.  THE ASYMPTOTIC EXPANSION IS USED TO GENERATE VALUES
C         GREATER THAN ZMIN WHICH ARE ADJUSTED BY THE RECURSION
C         G(Z+1)=Z*G(Z) FOR Z.LE.ZMIN.  THE FUNCTION WAS MADE AS
C         PORTABLE AS POSSIBLE BY COMPUTIMG ZMIN FROM THE NUMBER OF BASE
C         10 DIGITS IN A WORD, RLN=AMAX1(-ALOG10(R1MACH(4)),0.5E-18)
C         LIMITED TO 18 DIGITS OF (RELATIVE) ACCURACY.
C
C         SINCE INTEGER ARGUMENTS ARE COMMON, A TABLE LOOK UP ON 100
C         VALUES IS USED FOR SPEED OF EXECUTION.
C
C     DESCRIPTION OF ARGUMENTS
C
C         INPUT      Z IS D0UBLE PRECISION
C           Z      - ARGUMENT, Z.GT.0.0D0
C
C         OUTPUT      DGAMLN IS DOUBLE PRECISION
C           DGAMLN  - NATURAL LOG OF THE GAMMA FUNCTION AT Z.NE.0.0D0
C           IERR    - ERROR FLAG
C                     IERR=0, NORMAL RETURN, COMPUTATION COMPLETED
C                     IERR=1, Z.LE.0.0D0,    NO COMPUTATION
C
C
C***REFERENCES  COMPUTATION OF BESSEL FUNCTIONS OF COMPLEX ARGUMENT
C                 BY D. E. AMOS, SAND83-0083, MAY, 1983.
C***ROUTINES CALLED  I1MACH,D1MACH
C***END PROLOGUE  DGAMLN
      DOUBLE PRECISION CF, CON, FLN, FZ, GLN, RLN, S, TLG, TRM, TST,
     * T1, WDTOL, Z, ZDMY, ZINC, ZM, ZMIN, ZP, ZSQ, D1MACH
      INTEGER I, IERR, I1M, K, MZ, NZ, I1MACH
      DIMENSION CF(22), GLN(100)
C           LNGAMMA(N), N=1,100
      DATA GLN(1), GLN(2), GLN(3), GLN(4), GLN(5), GLN(6), GLN(7),
     1     GLN(8), GLN(9), GLN(10), GLN(11), GLN(12), GLN(13), GLN(14),
     2     GLN(15), GLN(16), GLN(17), GLN(18), GLN(19), GLN(20),
     3     GLN(21), GLN(22)/
     4     0.00000000000000000D+00,     0.00000000000000000D+00,
     5     6.93147180559945309D-01,     1.79175946922805500D+00,
     6     3.17805383034794562D+00,     4.78749174278204599D+00,
     7     6.57925121201010100D+00,     8.52516136106541430D+00,
     8     1.06046029027452502D+01,     1.28018274800814696D+01,
     9     1.51044125730755153D+01,     1.75023078458738858D+01,
     A     1.99872144956618861D+01,     2.25521638531234229D+01,
     B     2.51912211827386815D+01,     2.78992713838408916D+01,
     C     3.06718601060806728D+01,     3.35050734501368889D+01,
     D     3.63954452080330536D+01,     3.93398841871994940D+01,
     E     4.23356164607534850D+01,     4.53801388984769080D+01/
      DATA GLN(23), GLN(24), GLN(25), GLN(26), GLN(27), GLN(28),
     1     GLN(29), GLN(30), GLN(31), GLN(32), GLN(33), GLN(34),
     2     GLN(35), GLN(36), GLN(37), GLN(38), GLN(39), GLN(40),
     3     GLN(41), GLN(42), GLN(43), GLN(44)/
     4     4.84711813518352239D+01,     5.16066755677643736D+01,
     5     5.47847293981123192D+01,     5.80036052229805199D+01,
     6     6.12617017610020020D+01,     6.45575386270063311D+01,
     7     6.78897431371815350D+01,     7.12570389671680090D+01,
     8     7.46582363488301644D+01,     7.80922235533153106D+01,
     9     8.15579594561150372D+01,     8.50544670175815174D+01,
     A     8.85808275421976788D+01,     9.21361756036870925D+01,
     B     9.57196945421432025D+01,     9.93306124547874269D+01,
     C     1.02968198614513813D+02,     1.06631760260643459D+02,
     D     1.10320639714757395D+02,     1.14034211781461703D+02,
     E     1.17771881399745072D+02,     1.21533081515438634D+02/
      DATA GLN(45), GLN(46), GLN(47), GLN(48), GLN(49), GLN(50),
     1     GLN(51), GLN(52), GLN(53), GLN(54), GLN(55), GLN(56),
     2     GLN(57), GLN(58), GLN(59), GLN(60), GLN(61), GLN(62),
     3     GLN(63), GLN(64), GLN(65), GLN(66)/
     4     1.25317271149356895D+02,     1.29123933639127215D+02,
     5     1.32952575035616310D+02,     1.36802722637326368D+02,
     6     1.40673923648234259D+02,     1.44565743946344886D+02,
     7     1.48477766951773032D+02,     1.52409592584497358D+02,
     8     1.56360836303078785D+02,     1.60331128216630907D+02,
     9     1.64320112263195181D+02,     1.68327445448427652D+02,
     A     1.72352797139162802D+02,     1.76395848406997352D+02,
     B     1.80456291417543771D+02,     1.84533828861449491D+02,
     C     1.88628173423671591D+02,     1.92739047287844902D+02,
     D     1.96866181672889994D+02,     2.01009316399281527D+02,
     E     2.05168199482641199D+02,     2.09342586752536836D+02/
      DATA GLN(67), GLN(68), GLN(69), GLN(70), GLN(71), GLN(72),
     1     GLN(73), GLN(74), GLN(75), GLN(76), GLN(77), GLN(78),
     2     GLN(79), GLN(80), GLN(81), GLN(82), GLN(83), GLN(84),
     3     GLN(85), GLN(86), GLN(87), GLN(88)/
     4     2.13532241494563261D+02,     2.17736934113954227D+02,
     5     2.21956441819130334D+02,     2.26190548323727593D+02,
     6     2.30439043565776952D+02,     2.34701723442818268D+02,
     7     2.38978389561834323D+02,     2.43268849002982714D+02,
     8     2.47572914096186884D+02,     2.51890402209723194D+02,
     9     2.56221135550009525D+02,     2.60564940971863209D+02,
     A     2.64921649798552801D+02,     2.69291097651019823D+02,
     B     2.73673124285693704D+02,     2.78067573440366143D+02,
     C     2.82474292687630396D+02,     2.86893133295426994D+02,
     D     2.91323950094270308D+02,     2.95766601350760624D+02,
     E     3.00220948647014132D+02,     3.04686856765668715D+02/
      DATA GLN(89), GLN(90), GLN(91), GLN(92), GLN(93), GLN(94),
     1     GLN(95), GLN(96), GLN(97), GLN(98), GLN(99), GLN(100)/
     2     3.09164193580146922D+02,     3.13652829949879062D+02,
     3     3.18152639620209327D+02,     3.22663499126726177D+02,
     4     3.27185287703775217D+02,     3.31717887196928473D+02,
     5     3.36261181979198477D+02,     3.40815058870799018D+02,
     6     3.45379407062266854D+02,     3.49954118040770237D+02,
     7     3.54539085519440809D+02,     3.59134205369575399D+02/
C             COEFFICIENTS OF ASYMPTOTIC EXPANSION
      DATA CF(1), CF(2), CF(3), CF(4), CF(5), CF(6), CF(7), CF(8),
     1     CF(9), CF(10), CF(11), CF(12), CF(13), CF(14), CF(15),
     2     CF(16), CF(17), CF(18), CF(19), CF(20), CF(21), CF(22)/
     3     8.33333333333333333D-02,    -2.77777777777777778D-03,
     4     7.93650793650793651D-04,    -5.95238095238095238D-04,
     5     8.41750841750841751D-04,    -1.91752691752691753D-03,
     6     6.41025641025641026D-03,    -2.95506535947712418D-02,
     7     1.79644372368830573D-01,    -1.39243221690590112D+00,
     8     1.34028640441683920D+01,    -1.56848284626002017D+02,
     9     2.19310333333333333D+03,    -3.61087712537249894D+04,
     A     6.91472268851313067D+05,    -1.52382215394074162D+07,
     B     3.82900751391414141D+08,    -1.08822660357843911D+10,
     C     3.47320283765002252D+11,    -1.23696021422692745D+13,
     D     4.88788064793079335D+14,    -2.13203339609193739D+16/
C
C             LN(2*PI)
      DATA CON                    /     1.83787706640934548D+00/
C
C***FIRST EXECUTABLE STATEMENT  DGAMLN
      IERR=0
      IF (Z.LE.0.0D0) GO TO 70
      IF (Z.GT.101.0D0) GO TO 10
      NZ = INT(SNGL(Z))
      FZ = Z - FLOAT(NZ)
      IF (FZ.GT.0.0D0) GO TO 10
      IF (NZ.GT.100) GO TO 10
      DGAMLN = GLN(NZ)
      RETURN
   10 CONTINUE
      WDTOL = D1MACH(4)
      WDTOL = DMAX1(WDTOL,0.5D-18)
      I1M = I1MACH(14)
      RLN = D1MACH(5)*FLOAT(I1M)
      FLN = DMIN1(RLN,20.0D0)
      FLN = DMAX1(FLN,3.0D0)
      FLN = FLN - 3.0D0
      ZM = 1.8000D0 + 0.3875D0*FLN
      MZ = INT(SNGL(ZM)) + 1
      ZMIN = FLOAT(MZ)
      ZDMY = Z
      ZINC = 0.0D0
      IF (Z.GE.ZMIN) GO TO 20
      ZINC = ZMIN - FLOAT(NZ)
      ZDMY = Z + ZINC
   20 CONTINUE
      ZP = 1.0D0/ZDMY
      T1 = CF(1)*ZP
      S = T1
      IF (ZP.LT.WDTOL) GO TO 40
      ZSQ = ZP*ZP
      TST = T1*WDTOL
      DO 30 K=2,22
        ZP = ZP*ZSQ
        TRM = CF(K)*ZP
        IF (DABS(TRM).LT.TST) GO TO 40
        S = S + TRM
   30 CONTINUE
   40 CONTINUE
      IF (ZINC.NE.0.0D0) GO TO 50
      TLG = DLOG(Z)
      DGAMLN = Z*(TLG-1.0D0) + 0.5D0*(CON-TLG) + S
      RETURN
   50 CONTINUE
      ZP = 1.0D0
      NZ = INT(SNGL(ZINC))
      DO 60 I=1,NZ
        ZP = ZP*(Z+FLOAT(I-1))
   60 CONTINUE
      TLG = DLOG(ZDMY)
      DGAMLN = ZDMY*(TLG-1.0D0) - DLOG(ZP) + 0.5D0*(CON-TLG) + S
      RETURN
C
C
   70 CONTINUE
      IERR=1
      RETURN
      END
*DECK I1MACH
      INTEGER FUNCTION I1MACH(I)
C***BEGIN PROLOGUE  I1MACH
C***DATE WRITTEN   750101   (YYMMDD)
C***REVISION DATE  890213   (YYMMDD)
C***CATEGORY NO.  R1
C***KEYWORDS  LIBRARY=SLATEC,TYPE=INTEGER(I1MACH-I),MACHINE CONSTANTS
C***AUTHOR  FOX, P. A., (BELL LABS)
C           HALL, A. D., (BELL LABS)
C           SCHRYER, N. L., (BELL LABS)
C***PURPOSE  Returns integer machine dependent constants
C***DESCRIPTION
C
C     I1MACH can be used to obtain machine-dependent parameters
C     for the local machine environment.  It is a function
C     subroutine with one (input) argument, and can be called
C     as follows, for example
C
C          K = I1MACH(I)
C
C     where I=1,...,16.  The (output) value of K above is
C     determined by the (input) value of I.  The results for
C     various values of I are discussed below.
C
C  I/O unit numbers.
C    I1MACH( 1) = the standard input unit.
C    I1MACH( 2) = the standard output unit.
C    I1MACH( 3) = the standard punch unit.
C    I1MACH( 4) = the standard error message unit.
C
C  Words.
C    I1MACH( 5) = the number of bits per integer storage unit.
C    I1MACH( 6) = the number of characters per integer storage unit.
C
C  Integers.
C    assume integers are represented in the S-digit, base-A form
C
C               sign ( X(S-1)*A**(S-1) + ... + X(1)*A + X(0) )
C
C               where 0 .LE. X(I) .LT. A for I=0,...,S-1.
C    I1MACH( 7) = A, the base.
C    I1MACH( 8) = S, the number of base-A digits.
C    I1MACH( 9) = A**S - 1, the largest magnitude.
C
C  Floating-Point Numbers.
C    Assume floating-point numbers are represented in the T-digit,
C    base-B form
C               sign (B**E)*( (X(1)/B) + ... + (X(T)/B**T) )
C
C               where 0 .LE. X(I) .LT. B for I=1,...,T,
C               0 .LT. X(1), and EMIN .LE. E .LE. EMAX.
C    I1MACH(10) = B, the base.
C
C  Single-Precision
C    I1MACH(11) = T, the number of base-B digits.
C    I1MACH(12) = EMIN, the smallest exponent E.
C    I1MACH(13) = EMAX, the largest exponent E.
C
C  Double-Precision
C    I1MACH(14) = T, the number of base-B digits.
C    I1MACH(15) = EMIN, the smallest exponent E.
C    I1MACH(16) = EMAX, the largest exponent E.
C
C  To alter this function for a particular environment,
C  the desired set of DATA statements should be activated by
C  removing the C from column 1.  Also, the values of
C  I1MACH(1) - I1MACH(4) should be checked for consistency
C  with the local operating system.
C
C***REFERENCES  FOX P.A., HALL A.D., SCHRYER N.L.,*FRAMEWORK FOR A
C                 PORTABLE LIBRARY*, ACM TRANSACTIONS ON MATHEMATICAL
C                 SOFTWARE, VOL. 4, NO. 2, JUNE 1978, PP. 177-188.
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  I1MACH
C
      INTEGER IMACH(16),OUTPUT
      SAVE IMACH
      EQUIVALENCE (IMACH(4),OUTPUT)
C
C     MACHINE CONSTANTS FOR THE AMIGA
C     ABSOFT COMPILER
C
C     DATA IMACH(1) /    5 /
C     DATA IMACH(2) /    6 /
C     DATA IMACH(3) /    5 /
C     DATA IMACH(4) /    6 /
C     DATA IMACH(5) /   32 /
C     DATA IMACH(6) /    4 /
C     DATA IMACH(7) /    2 /
C     DATA IMACH(8) /   31 /
C     DATA IMACH(9) / 2147483647 /
C     DATA IMACH(10)/    2 /
C     DATA IMACH(11)/   24 /
C     DATA IMACH(12)/ -126 /
C     DATA IMACH(13)/  127 /
C     DATA IMACH(14)/   53 /
C     DATA IMACH(15)/ -1022 /
C     DATA IMACH(16)/  1023 /
C
C     MACHINE CONSTANTS FOR THE APOLLO
C
C     DATA IMACH(1) /    5 /
C     DATA IMACH(2) /    6 /
C     DATA IMACH(3) /    6 /
C     DATA IMACH(4) /    6 /
C     DATA IMACH(5) /   32 /
C     DATA IMACH(6) /    4 /
C     DATA IMACH(7) /    2 /
C     DATA IMACH(8) /   31 /
C     DATA IMACH(9) / 2147483647 /
C     DATA IMACH(10)/    2 /
C     DATA IMACH(11)/   24 /
C     DATA IMACH(12)/ -125 /
C     DATA IMACH(13)/  129 /
C     DATA IMACH(14)/   53 /
C     DATA IMACH(15)/ -1021 /
C     DATA IMACH(16)/  1025 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 1700 SYSTEM
C
C     DATA IMACH( 1) /    7 /
C     DATA IMACH( 2) /    2 /
C     DATA IMACH( 3) /    2 /
C     DATA IMACH( 4) /    2 /
C     DATA IMACH( 5) /   36 /
C     DATA IMACH( 6) /    4 /
C     DATA IMACH( 7) /    2 /
C     DATA IMACH( 8) /   33 /
C     DATA IMACH( 9) / Z1FFFFFFFF /
C     DATA IMACH(10) /    2 /
C     DATA IMACH(11) /   24 /
C     DATA IMACH(12) / -256 /
C     DATA IMACH(13) /  255 /
C     DATA IMACH(14) /   60 /
C     DATA IMACH(15) / -256 /
C     DATA IMACH(16) /  255 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 5700 SYSTEM
C
C     DATA IMACH( 1) /   5 /
C     DATA IMACH( 2) /   6 /
C     DATA IMACH( 3) /   7 /
C     DATA IMACH( 4) /   6 /
C     DATA IMACH( 5) /  48 /
C     DATA IMACH( 6) /   6 /
C     DATA IMACH( 7) /   2 /
C     DATA IMACH( 8) /  39 /
C     DATA IMACH( 9) / O0007777777777777 /
C     DATA IMACH(10) /   8 /
C     DATA IMACH(11) /  13 /
C     DATA IMACH(12) / -50 /
C     DATA IMACH(13) /  76 /
C     DATA IMACH(14) /  26 /
C     DATA IMACH(15) / -50 /
C     DATA IMACH(16) /  76 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 6700/7700 SYSTEMS
C
C     DATA IMACH( 1) /   5 /
C     DATA IMACH( 2) /   6 /
C     DATA IMACH( 3) /   7 /
C     DATA IMACH( 4) /   6 /
C     DATA IMACH( 5) /  48 /
C     DATA IMACH( 6) /   6 /
C     DATA IMACH( 7) /   2 /
C     DATA IMACH( 8) /  39 /
C     DATA IMACH( 9) / O0007777777777777 /
C     DATA IMACH(10) /   8 /
C     DATA IMACH(11) /  13 /
C     DATA IMACH(12) / -50 /
C     DATA IMACH(13) /  76 /
C     DATA IMACH(14) /  26 /
C     DATA IMACH(15) / -32754 /
C     DATA IMACH(16) /  32780 /
C
C     MACHINE CONSTANTS FOR THE CDC 170/180 SERIES USING NOS/VE
C
C     DATA IMACH( 1) /     5 /
C     DATA IMACH( 2) /     6 /
C     DATA IMACH( 3) /     7 /
C     DATA IMACH( 4) /     6 /
C     DATA IMACH( 5) /    64 /
C     DATA IMACH( 6) /     8 /
C     DATA IMACH( 7) /     2 /
C     DATA IMACH( 8) /    63 /
C     DATA IMACH( 9) / 9223372036854775807 /
C     DATA IMACH(10) /     2 /
C     DATA IMACH(11) /    47 /
C     DATA IMACH(12) / -4095 /
C     DATA IMACH(13) /  4094 /
C     DATA IMACH(14) /    94 /
C     DATA IMACH(15) / -4095 /
C     DATA IMACH(16) /  4094 /
C
C     MACHINE CONSTANTS FOR THE CDC 6000/7000 SERIES
C
C     DATA IMACH( 1) /    5 /
C     DATA IMACH( 2) /    6 /
C     DATA IMACH( 3) /    7 /
C     DATA IMACH( 4) /6LOUTPUT/
C     DATA IMACH( 5) /   60 /
C     DATA IMACH( 6) /   10 /
C     DATA IMACH( 7) /    2 /
C     DATA IMACH( 8) /   48 /
C     DATA IMACH( 9) / 00007777777777777777B /
C     DATA IMACH(10) /    2 /
C     DATA IMACH(11) /   47 /
C     DATA IMACH(12) / -929 /
C     DATA IMACH(13) / 1070 /
C     DATA IMACH(14) /   94 /
C     DATA IMACH(15) / -929 /
C     DATA IMACH(16) / 1069 /
C
C     MACHINE CONSTANTS FOR THE CELERITY C1260
C
C     DATA IMACH(1) /    5 /
C     DATA IMACH(2) /    6 /
C     DATA IMACH(3) /    6 /
C     DATA IMACH(4) /    0 /
C     DATA IMACH(5) /   32 /
C     DATA IMACH(6) /    4 /
C     DATA IMACH(7) /    2 /
C     DATA IMACH(8) /   31 /
C     DATA IMACH(9) / Z'7FFFFFFF' /
C     DATA IMACH(10)/    2 /
C     DATA IMACH(11)/   24 /
C     DATA IMACH(12)/ -126 /
C     DATA IMACH(13)/  127 /
C     DATA IMACH(14)/   53 /
C     DATA IMACH(15)/ -1022 /
C     DATA IMACH(16)/  1023 /
C
C     MACHINE CONSTANTS FOR THE CONVEX C-1
C
C     DATA IMACH( 1) /     5/
C     DATA IMACH( 2) /     6/
C     DATA IMACH( 3) /     7/
C     DATA IMACH( 4) /     6/
C     DATA IMACH( 5) /    32/
C     DATA IMACH( 6) /     4/
C     DATA IMACH( 7) /     2/
C     DATA IMACH( 8) /    31/
C     DATA IMACH( 9) /2147483647/
C     DATA IMACH(10) /     2/
C     DATA IMACH(11) /    24/
C     DATA IMACH(12) /  -128/
C     DATA IMACH(13) /   127/
C     DATA IMACH(14) /    53/
C     DATA IMACH(15) / -1024/
C     DATA IMACH(16) /  1023/
C
C     MACHINE CONSTANTS FOR THE CRAY-1
C
C     DATA IMACH( 1) /   100 /
C     DATA IMACH( 2) /   101 /
C     DATA IMACH( 3) /   102 /
C     DATA IMACH( 4) /   101 /
C     DATA IMACH( 5) /    64 /
C     DATA IMACH( 6) /     8 /
C     DATA IMACH( 7) /     2 /
C     DATA IMACH( 8) /    63 /
C     DATA IMACH( 9) /  777777777777777777777B /
C     DATA IMACH(10) /     2 /
C     DATA IMACH(11) /    47 /
C     DATA IMACH(12) / -8189 /
C     DATA IMACH(13) /  8190 /
C     DATA IMACH(14) /    94 /
C     DATA IMACH(15) / -8099 /
C     DATA IMACH(16) /  8190 /
C
C     MACHINE CONSTANTS FOR THE DATA GENERAL ECLIPSE S/200
C
C     DATA IMACH( 1) /   11 /
C     DATA IMACH( 2) /   12 /
C     DATA IMACH( 3) /    8 /
C     DATA IMACH( 4) /   10 /
C     DATA IMACH( 5) /   16 /
C     DATA IMACH( 6) /    2 /
C     DATA IMACH( 7) /    2 /
C     DATA IMACH( 8) /   15 /
C     DATA IMACH( 9) /32767 /
C     DATA IMACH(10) /   16 /
C     DATA IMACH(11) /    6 /
C     DATA IMACH(12) /  -64 /
C     DATA IMACH(13) /   63 /
C     DATA IMACH(14) /   14 /
C     DATA IMACH(15) /  -64 /
C     DATA IMACH(16) /   63 /
C
C     MACHINE CONSTANTS FOR THE ELXSI 6400
C
C     DATA IMACH( 1) /     5/
C     DATA IMACH( 2) /     6/
C     DATA IMACH( 3) /     6/
C     DATA IMACH( 4) /     6/
C     DATA IMACH( 5) /    32/
C     DATA IMACH( 6) /     4/
C     DATA IMACH( 7) /     2/
C     DATA IMACH( 8) /    32/
C     DATA IMACH( 9) /2147483647/
C     DATA IMACH(10) /     2/
C     DATA IMACH(11) /    24/
C     DATA IMACH(12) /  -126/
C     DATA IMACH(13) /   127/
C     DATA IMACH(14) /    53/
C     DATA IMACH(15) / -1022/
C     DATA IMACH(16) /  1023/
C
C     MACHINE CONSTANTS FOR THE HARRIS 220
C
C     DATA IMACH( 1) /       5 /
C     DATA IMACH( 2) /       6 /
C     DATA IMACH( 3) /       0 /
C     DATA IMACH( 4) /       6 /
C     DATA IMACH( 5) /      24 /
C     DATA IMACH( 6) /       3 /
C     DATA IMACH( 7) /       2 /
C     DATA IMACH( 8) /      23 /
C     DATA IMACH( 9) / 8388607 /
C     DATA IMACH(10) /       2 /
C     DATA IMACH(11) /      23 /
C     DATA IMACH(12) /    -127 /
C     DATA IMACH(13) /     127 /
C     DATA IMACH(14) /      38 /
C     DATA IMACH(15) /    -127 /
C     DATA IMACH(16) /     127 /
C
C     MACHINE CONSTANTS FOR THE HONEYWELL 600/6000 SERIES
C
C     DATA IMACH( 1) /    5 /
C     DATA IMACH( 2) /    6 /
C     DATA IMACH( 3) /   43 /
C     DATA IMACH( 4) /    6 /
C     DATA IMACH( 5) /   36 /
C     DATA IMACH( 6) /    6 /
C     DATA IMACH( 7) /    2 /
C     DATA IMACH( 8) /   35 /
C     DATA IMACH( 9) / O377777777777 /
C     DATA IMACH(10) /    2 /
C     DATA IMACH(11) /   27 /
C     DATA IMACH(12) / -127 /
C     DATA IMACH(13) /  127 /
C     DATA IMACH(14) /   63 /
C     DATA IMACH(15) / -127 /
C     DATA IMACH(16) /  127 /
C
C     MACHINE CONSTANTS FOR THE HP 2100
C     3 WORD DOUBLE PRECISION OPTION WITH FTN4
C
C     DATA IMACH(1) /      5/
C     DATA IMACH(2) /      6 /
C     DATA IMACH(3) /      4 /
C     DATA IMACH(4) /      1 /
C     DATA IMACH(5) /     16 /
C     DATA IMACH(6) /      2 /
C     DATA IMACH(7) /      2 /
C     DATA IMACH(8) /     15 /
C     DATA IMACH(9) /  32767 /
C     DATA IMACH(10)/      2 /
C     DATA IMACH(11)/     23 /
C     DATA IMACH(12)/   -128 /
C     DATA IMACH(13)/    127 /
C     DATA IMACH(14)/     39 /
C     DATA IMACH(15)/   -128 /
C     DATA IMACH(16)/    127 /
C
C     MACHINE CONSTANTS FOR THE HP 2100
C     4 WORD DOUBLE PRECISION OPTION WITH FTN4
C
C     DATA IMACH(1) /      5 /
C     DATA IMACH(2) /      6 /
C     DATA IMACH(3) /      4 /
C     DATA IMACH(4) /      1 /
C     DATA IMACH(5) /     16 /
C     DATA IMACH(6) /      2 /
C     DATA IMACH(7) /      2 /
C     DATA IMACH(8) /     15 /
C     DATA IMACH(9) /  32767 /
C     DATA IMACH(10)/      2 /
C     DATA IMACH(11)/     23 /
C     DATA IMACH(12)/   -128 /
C     DATA IMACH(13)/    127 /
C     DATA IMACH(14)/     55 /
C     DATA IMACH(15)/   -128 /
C     DATA IMACH(16)/    127 /
C
C     MACHINE CONSTANTS FOR THE HP 9000
C
C     DATA IMACH(1)  /    5 /
C     DATA IMACH(2)  /    6 /
C     DATA IMACH(3)  /    6 /
C     DATA IMACH(3)  /    7 /
C     DATA IMACH(5)  /   32 /
C     DATA IMACH(6)  /    4 /
C     DATA IMACH(7)  /    2 /
C     DATA IMACH(8)  /   32 /
C     DATA IMACH(9)  /2147483647 /
C     DATA IMACH(10) /    2 /
C     DATA IMACH(11) /   24 /
C     DATA IMACH(12) / -126 /
C     DATA IMACH(13) /  127 /
C     DATA IMACH(14) /   53 /
C     DATA IMACH(15) /-1015 /
C     DATA IMACH(16) / 1017 /
C
C     MACHINE CONSTANTS FOR THE IBM 360/370 SERIES,
C     THE XEROX SIGMA 5/7/9, THE SEL SYSTEMS 85/86, AND
C     THE PERKIN ELMER (INTERDATA) 7/32.
C
C     DATA IMACH( 1) /   5 /
C     DATA IMACH( 2) /   6 /
C     DATA IMACH( 3) /   7 /
C     DATA IMACH( 4) /   6 /
C     DATA IMACH( 5) /  32 /
C     DATA IMACH( 6) /   4 /
C     DATA IMACH( 7) /  16 /
C     DATA IMACH( 8) /  31 /
C     DATA IMACH( 9) / Z7FFFFFFF /
C     DATA IMACH(10) /  16 /
C     DATA IMACH(11) /   6 /
C     DATA IMACH(12) / -64 /
C     DATA IMACH(13) /  63 /
C     DATA IMACH(14) /  14 /
C     DATA IMACH(15) / -64 /
C     DATA IMACH(16) /  63 /
C
C     MACHINE CONSTANTS FOR THE IBM PC
C
C     DATA IMACH( 1) /     5 /
C     DATA IMACH( 2) /     6 /
C     DATA IMACH( 3) /     0 /
C     DATA IMACH( 4) /     0 /
C     DATA IMACH( 5) /    32 /
C     DATA IMACH( 6) /     4 /
C     DATA IMACH( 7) /     2 /
C     DATA IMACH( 8) /    31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /     2 /
C     DATA IMACH(11) /    24 /
C     DATA IMACH(12) /  -125 /
C     DATA IMACH(13) /   127 /
C     DATA IMACH(14) /    53 /
C     DATA IMACH(15) / -1021 /
C     DATA IMACH(16) /  1023 /
C
C     MACHINE CONSTANTS FOR THE IBM RS 6000
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          0 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        128 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1024 /
C
C     MACHINE CONSTANTS FOR THE PDP-10 (KA PROCESSOR)
C
C     DATA IMACH( 1) /    5 /
C     DATA IMACH( 2) /    6 /
C     DATA IMACH( 3) /    5 /
C     DATA IMACH( 4) /    6 /
C     DATA IMACH( 5) /   36 /
C     DATA IMACH( 6) /    5 /
C     DATA IMACH( 7) /    2 /
C     DATA IMACH( 8) /   35 /
C     DATA IMACH( 9) / "377777777777 /
C     DATA IMACH(10) /    2 /
C     DATA IMACH(11) /   27 /
C     DATA IMACH(12) / -128 /
C     DATA IMACH(13) /  127 /
C     DATA IMACH(14) /   54 /
C     DATA IMACH(15) / -101 /
C     DATA IMACH(16) /  127 /
C
C     MACHINE CONSTANTS FOR THE PDP-10 (KI PROCESSOR)
C
C     DATA IMACH( 1) /    5 /
C     DATA IMACH( 2) /    6 /
C     DATA IMACH( 3) /    5 /
C     DATA IMACH( 4) /    6 /
C     DATA IMACH( 5) /   36 /
C     DATA IMACH( 6) /    5 /
C     DATA IMACH( 7) /    2 /
C     DATA IMACH( 8) /   35 /
C     DATA IMACH( 9) / "377777777777 /
C     DATA IMACH(10) /    2 /
C     DATA IMACH(11) /   27 /
C     DATA IMACH(12) / -128 /
C     DATA IMACH(13) /  127 /
C     DATA IMACH(14) /   62 /
C     DATA IMACH(15) / -128 /
C     DATA IMACH(16) /  127 /
C
C     MACHINE CONSTANTS FOR PDP-11 FORTRAN SUPPORTING
C     32-BIT INTEGER ARITHMETIC.
C
C     DATA IMACH( 1) /    5 /
C     DATA IMACH( 2) /    6 /
C     DATA IMACH( 3) /    5 /
C     DATA IMACH( 4) /    6 /
C     DATA IMACH( 5) /   32 /
C     DATA IMACH( 6) /    4 /
C     DATA IMACH( 7) /    2 /
C     DATA IMACH( 8) /   31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /    2 /
C     DATA IMACH(11) /   24 /
C     DATA IMACH(12) / -127 /
C     DATA IMACH(13) /  127 /
C     DATA IMACH(14) /   56 /
C     DATA IMACH(15) / -127 /
C     DATA IMACH(16) /  127 /
C
C     MACHINE CONSTANTS FOR PDP-11 FORTRAN SUPPORTING
C     16-BIT INTEGER ARITHMETIC.
C
C     DATA IMACH( 1) /    5 /
C     DATA IMACH( 2) /    6 /
C     DATA IMACH( 3) /    5 /
C     DATA IMACH( 4) /    6 /
C     DATA IMACH( 5) /   16 /
C     DATA IMACH( 6) /    2 /
C     DATA IMACH( 7) /    2 /
C     DATA IMACH( 8) /   15 /
C     DATA IMACH( 9) / 32767 /
C     DATA IMACH(10) /    2 /
C     DATA IMACH(11) /   24 /
C     DATA IMACH(12) / -127 /
C     DATA IMACH(13) /  127 /
C     DATA IMACH(14) /   56 /
C     DATA IMACH(15) / -127 /
C     DATA IMACH(16) /  127 /
C
C     MACHINE CONSTANTS FOR THE SILICON GRAPHICS IRIS
C
      DATA IMACH( 1) /     5 /
      DATA IMACH( 2) /     6 /
      DATA IMACH( 3) /     6 /
      DATA IMACH( 4) /     0 /
      DATA IMACH( 5) /    32 /
      DATA IMACH( 6) /     4 /
      DATA IMACH( 7) /     2 /
      DATA IMACH( 8) /    31 /
      DATA IMACH( 9) / 2147483647 /
      DATA IMACH(10) /     2 /
      DATA IMACH(11) /    23 /
      DATA IMACH(12) /  -126 /
      DATA IMACH(13) /   127 /
      DATA IMACH(14) /    52 /
      DATA IMACH(15) / -1022 /
      DATA IMACH(16) /  1023 /
C
C     MACHINE CONSTANTS FOR THE SUN
C
C     DATA IMACH(1) /    5 /
C     DATA IMACH(2) /    6 /
C     DATA IMACH(3) /    6 /
C     DATA IMACH(4) /    6 /
C     DATA IMACH(5) /   32 /
C     DATA IMACH(6) /    4 /
C     DATA IMACH(7) /    2 /
C     DATA IMACH(8) /   31 /
C     DATA IMACH(9) /2147483647 /
C     DATA IMACH(10)/    2 /
C     DATA IMACH(11)/   24 /
C     DATA IMACH(12)/ -125 /
C     DATA IMACH(13)/  128 /
C     DATA IMACH(14)/   53 /
C     DATA IMACH(15)/ -1021 /
C     DATA IMACH(16)/  1024 /
C
C     MACHINE CONSTANTS FOR THE UNIVAC 1100 SERIES FTN COMPILER
C
C
C     DATA IMACH( 1) /    5 /
C     DATA IMACH( 2) /    6 /
C     DATA IMACH( 3) /    1 /
C     DATA IMACH( 4) /    6 /
C     DATA IMACH( 5) /   36 /
C     DATA IMACH( 6) /    4 /
C     DATA IMACH( 7) /    2 /
C     DATA IMACH( 8) /   35 /
C     DATA IMACH( 9) / O377777777777 /
C     DATA IMACH(10) /    2 /
C     DATA IMACH(11) /   27 /
C     DATA IMACH(12) / -128 /
C     DATA IMACH(13) /  127 /
C     DATA IMACH(14) /   60 /
C     DATA IMACH(15) /-1024 /
C     DATA IMACH(16) / 1023 /
C
C     MACHINE CONSTANTS FOR THE VAX 11/780
C
C     DATA IMACH(1) /    5 /
C     DATA IMACH(2) /    6 /
C     DATA IMACH(3) /    5 /
C     DATA IMACH(4) /    6 /
C     DATA IMACH(5) /   32 /
C     DATA IMACH(6) /    4 /
C     DATA IMACH(7) /    2 /
C     DATA IMACH(8) /   31 /
C     DATA IMACH(9) /2147483647 /
C     DATA IMACH(10)/    2 /
C     DATA IMACH(11)/   24 /
C     DATA IMACH(12)/ -127 /
C     DATA IMACH(13)/  127 /
C     DATA IMACH(14)/   56 /
C     DATA IMACH(15)/ -127 /
C     DATA IMACH(16)/  127 /
C
C     MACHINE CONSTANTS FOR THE VAX 11/780, G-FLOAT OPTION
C
C     DATA IMACH(1) /    5 /
C     DATA IMACH(2) /    6 /
C     DATA IMACH(3) /    5 /
C     DATA IMACH(4) /    6 /
C     DATA IMACH(5) /   32 /
C     DATA IMACH(6) /    4 /
C     DATA IMACH(7) /    2 /
C     DATA IMACH(8) /   31 /
C     DATA IMACH(9) /2147483647 /
C     DATA IMACH(10)/    2 /
C     DATA IMACH(11)/   24 /
C     DATA IMACH(12)/ -127 /
C     DATA IMACH(13)/  127 /
C     DATA IMACH(14)/   53 /
C     DATA IMACH(15)/ -1022 /
C     DATA IMACH(16)/  1023 /
C
C     MACHINE CONSTANTS FOR THE Z80 MICROPROCESSOR
C
C     DATA IMACH( 1) /     1/
C     DATA IMACH( 2) /     1/
C     DATA IMACH( 3) /     0/
C     DATA IMACH( 4) /     1/
C     DATA IMACH( 5) /    16/
C     DATA IMACH( 6) /     2/
C     DATA IMACH( 7) /     2/
C     DATA IMACH( 8) /    15/
C     DATA IMACH( 9) / 32767/
C     DATA IMACH(10) /     2/
C     DATA IMACH(11) /    24/
C     DATA IMACH(12) /  -127/
C     DATA IMACH(13) /   127/
C     DATA IMACH(14) /    56/
C     DATA IMACH(15) /  -127/
C     DATA IMACH(16) /   127/
C
C
C***FIRST EXECUTABLE STATEMENT  I1MACH
      IF (I .LT. 1  .OR.  I .GT. 16) GO TO 10
C
      I1MACH = IMACH(I)
      RETURN
C
   10 CONTINUE
      WRITE (UNIT = OUTPUT, FMT = 9000)
 9000 FORMAT ('1ERROR    1 IN I1MACH - I OUT OF BOUNDS')
C
C     CALL FDUMP
C
C
      STOP
      END
      SUBROUTINE XERROR(MESS,NMESS,L1,L2)
C
C     THIS IS A DUMMY XERROR ROUTINE TO PRINT ERROR MESSAGES WITH NMESS
C     CHARACTERS. L1 AND L2 ARE DUMMY PARAMETERS TO MAKE THIS CALL
C     COMPATIBLE WITH THE SLATEC XERROR ROUTINE. THIS IS A FORTRAN 77
C     ROUTINE.
C
      CHARACTER*(*) MESS
      NN=NMESS/70
      NR=NMESS-70*NN
      IF(NR.NE.0) NN=NN+1
      K=1
      PRINT 900
  900 FORMAT(/)
      DO 10 I=1,NN
        KMIN=MIN0(K+69,NMESS)
        PRINT *, MESS(K:KMIN)
        K=K+70
   10 CONTINUE
      PRINT 900
      RETURN
      END
      DOUBLE PRECISION FUNCTION AZABS(ZR, ZI)
C***BEGIN PROLOGUE  AZABS
C***REFER TO  ZBESH,ZBESI,ZBESJ,ZBESK,ZBESY,ZAIRY,ZBIRY
C
C     AZABS COMPUTES THE ABSOLUTE VALUE OR MAGNITUDE OF A DOUBLE
C     PRECISION COMPLEX VARIABLE CMPLX(ZR,ZI)
C
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  AZABS
      DOUBLE PRECISION ZR, ZI, U, V, Q, S
      U = DABS(ZR)
      V = DABS(ZI)
      S = U + V
C-----------------------------------------------------------------------
C     S*1.0D0 MAKES AN UNNORMALIZED UNDERFLOW ON CDC MACHINES INTO A
C     TRUE FLOATING ZERO
C-----------------------------------------------------------------------
      S = S*1.0D+0
      IF (S.EQ.0.0D+0) GO TO 20
      IF (U.GT.V) GO TO 10
      Q = U/V
      AZABS = V*DSQRT(1.D+0+Q*Q)
      RETURN
   10 Q = V/U
      AZABS = U*DSQRT(1.D+0+Q*Q)
      RETURN
   20 AZABS = 0.0D+0
      RETURN
      END
      SUBROUTINE ZACAI(ZR, ZI, FNU, KODE, MR, N, YR, YI, NZ, RL, TOL,
     * ELIM, ALIM)
C***BEGIN PROLOGUE  ZACAI
C***REFER TO  ZAIRY
C
C     ZACAI APPLIES THE ANALYTIC CONTINUATION FORMULA
C
C         K(FNU,ZN*EXP(MP))=K(FNU,ZN)*EXP(-MP*FNU) - MP*I(FNU,ZN)
C                 MP=PI*MR*CMPLX(0.0,1.0)
C
C     TO CONTINUE THE K FUNCTION FROM THE RIGHT HALF TO THE LEFT
C     HALF Z PLANE FOR USE WITH ZAIRY WHERE FNU=1/3 OR 2/3 AND N=1.
C     ZACAI IS THE SAME AS ZACON WITH THE PARTS FOR LARGER ORDERS AND
C     RECURRENCE REMOVED. A RECURSIVE CALL TO ZACON CAN RESULT IF ZACON
C     IS CALLED FROM ZAIRY.
C
C***ROUTINES CALLED  ZASYI,ZBKNU,ZMLRI,ZSERI,ZS1S2,D1MACH,AZABS
C***END PROLOGUE  ZACAI
C     COMPLEX CSGN,CSPN,C1,C2,Y,Z,ZN,CY
      DOUBLE PRECISION ALIM, ARG, ASCLE, AZ, CSGNR, CSGNI, CSPNR,
     * CSPNI, C1R, C1I, C2R, C2I, CYR, CYI, DFNU, ELIM, FMR, FNU, PI,
     * RL, SGN, TOL, YY, YR, YI, ZR, ZI, ZNR, ZNI, D1MACH, AZABS
      INTEGER INU, IUF, KODE, MR, N, NN, NW, NZ
      DIMENSION YR(N), YI(N), CYR(2), CYI(2)
      DATA PI / 3.14159265358979324D0 /
      NZ = 0
      ZNR = -ZR
      ZNI = -ZI
      AZ = AZABS(ZR,ZI)
      NN = N
      DFNU = FNU + DBLE(FLOAT(N-1))
      IF (AZ.LE.2.0D0) GO TO 10
      IF (AZ*AZ*0.25D0.GT.DFNU+1.0D0) GO TO 20
   10 CONTINUE
C-----------------------------------------------------------------------
C     POWER SERIES FOR THE I FUNCTION
C-----------------------------------------------------------------------
      CALL ZSERI(ZNR, ZNI, FNU, KODE, NN, YR, YI, NW, TOL, ELIM, ALIM)
      GO TO 40
   20 CONTINUE
      IF (AZ.LT.RL) GO TO 30
C-----------------------------------------------------------------------
C     ASYMPTOTIC EXPANSION FOR LARGE Z FOR THE I FUNCTION
C-----------------------------------------------------------------------
      CALL ZASYI(ZNR, ZNI, FNU, KODE, NN, YR, YI, NW, RL, TOL, ELIM,
     * ALIM)
      IF (NW.LT.0) GO TO 80
      GO TO 40
   30 CONTINUE
C-----------------------------------------------------------------------
C     MILLER ALGORITHM NORMALIZED BY THE SERIES FOR THE I FUNCTION
C-----------------------------------------------------------------------
      CALL ZMLRI(ZNR, ZNI, FNU, KODE, NN, YR, YI, NW, TOL)
      IF(NW.LT.0) GO TO 80
   40 CONTINUE
C-----------------------------------------------------------------------
C     ANALYTIC CONTINUATION TO THE LEFT HALF PLANE FOR THE K FUNCTION
C-----------------------------------------------------------------------
      CALL ZBKNU(ZNR, ZNI, FNU, KODE, 1, CYR, CYI, NW, TOL, ELIM, ALIM)
      IF (NW.NE.0) GO TO 80
      FMR = DBLE(FLOAT(MR))
      SGN = -DSIGN(PI,FMR)
      CSGNR = 0.0D0
      CSGNI = SGN
      IF (KODE.EQ.1) GO TO 50
      YY = -ZNI
      CSGNR = -CSGNI*DSIN(YY)
      CSGNI = CSGNI*DCOS(YY)
   50 CONTINUE
C-----------------------------------------------------------------------
C     CALCULATE CSPN=EXP(FNU*PI*I) TO MINIMIZE LOSSES OF SIGNIFICANCE
C     WHEN FNU IS LARGE
C-----------------------------------------------------------------------
      INU = INT(SNGL(FNU))
      ARG = (FNU-DBLE(FLOAT(INU)))*SGN
      CSPNR = DCOS(ARG)
      CSPNI = DSIN(ARG)
      IF (MOD(INU,2).EQ.0) GO TO 60
      CSPNR = -CSPNR
      CSPNI = -CSPNI
   60 CONTINUE
      C1R = CYR(1)
      C1I = CYI(1)
      C2R = YR(1)
      C2I = YI(1)
      IF (KODE.EQ.1) GO TO 70
      IUF = 0
      ASCLE = 1.0D+3*D1MACH(1)/TOL
      CALL ZS1S2(ZNR, ZNI, C1R, C1I, C2R, C2I, NW, ASCLE, ALIM, IUF)
      NZ = NZ + NW
   70 CONTINUE
      YR(1) = CSPNR*C1R - CSPNI*C1I + CSGNR*C2R - CSGNI*C2I
      YI(1) = CSPNR*C1I + CSPNI*C1R + CSGNR*C2I + CSGNI*C2R
      RETURN
   80 CONTINUE
      NZ = -1
      IF(NW.EQ.(-2)) NZ=-2
      RETURN
      END
      SUBROUTINE ZAIRY(ZR, ZI, ID, KODE, AIR, AII, NZ, IERR)
C***BEGIN PROLOGUE  ZAIRY
C***DATE WRITTEN   830501   (YYMMDD)
C***REVISION DATE  890801   (YYMMDD)
C***CATEGORY NO.  B5K
C***KEYWORDS  AIRY FUNCTION,BESSEL FUNCTIONS OF ORDER ONE THIRD
C***AUTHOR  AMOS, DONALD E., SANDIA NATIONAL LABORATORIES
C***PURPOSE  TO COMPUTE AIRY FUNCTIONS AI(Z) AND DAI(Z) FOR COMPLEX Z
C***DESCRIPTION
C
C                      ***A DOUBLE PRECISION ROUTINE***
C         ON KODE=1, ZAIRY COMPUTES THE COMPLEX AIRY FUNCTION AI(Z) OR
C         ITS DERIVATIVE DAI(Z)/DZ ON ID=0 OR ID=1 RESPECTIVELY. ON
C         KODE=2, A SCALING OPTION CEXP(ZTA)*AI(Z) OR CEXP(ZTA)*
C         DAI(Z)/DZ IS PROVIDED TO REMOVE THE EXPONENTIAL DECAY IN
C         -PI/3.LT.ARG(Z).LT.PI/3 AND THE EXPONENTIAL GROWTH IN
C         PI/3.LT.ABS(ARG(Z)).LT.PI WHERE ZTA=(2/3)*Z*CSQRT(Z).
C
C         WHILE THE AIRY FUNCTIONS AI(Z) AND DAI(Z)/DZ ARE ANALYTIC IN
C         THE WHOLE Z PLANE, THE CORRESPONDING SCALED FUNCTIONS DEFINED
C         FOR KODE=2 HAVE A CUT ALONG THE NEGATIVE REAL AXIS.
C         DEFINTIONS AND NOTATION ARE FOUND IN THE NBS HANDBOOK OF
C         MATHEMATICAL FUNCTIONS (REF. 1).
C
C         INPUT      ZR,ZI ARE DOUBLE PRECISION
C           ZR,ZI  - Z=CMPLX(ZR,ZI)
C           ID     - ORDER OF DERIVATIVE, ID=0 OR ID=1
C           KODE   - A PARAMETER TO INDICATE THE SCALING OPTION
C                    KODE= 1  RETURNS
C                             AI=AI(Z)                ON ID=0 OR
C                             AI=DAI(Z)/DZ            ON ID=1
C                        = 2  RETURNS
C                             AI=CEXP(ZTA)*AI(Z)       ON ID=0 OR
C                             AI=CEXP(ZTA)*DAI(Z)/DZ   ON ID=1 WHERE
C                             ZTA=(2/3)*Z*CSQRT(Z)
C
C         OUTPUT     AIR,AII ARE DOUBLE PRECISION
C           AIR,AII- COMPLEX ANSWER DEPENDING ON THE CHOICES FOR ID AND
C                    KODE
C           NZ     - UNDERFLOW INDICATOR
C                    NZ= 0   , NORMAL RETURN
C                    NZ= 1   , AI=CMPLX(0.0D0,0.0D0) DUE TO UNDERFLOW IN
C                              -PI/3.LT.ARG(Z).LT.PI/3 ON KODE=1
C           IERR   - ERROR FLAG
C                    IERR=0, NORMAL RETURN - COMPUTATION COMPLETED
C                    IERR=1, INPUT ERROR   - NO COMPUTATION
C                    IERR=2, OVERFLOW      - NO COMPUTATION, REAL(ZTA)
C                            TOO LARGE ON KODE=1
C                    IERR=3, CABS(Z) LARGE      - COMPUTATION COMPLETED
C                            LOSSES OF SIGNIFCANCE BY ARGUMENT REDUCTION
C                            PRODUCE LESS THAN HALF OF MACHINE ACCURACY
C                    IERR=4, CABS(Z) TOO LARGE  - NO COMPUTATION
C                            COMPLETE LOSS OF ACCURACY BY ARGUMENT
C                            REDUCTION
C                    IERR=5, ERROR              - NO COMPUTATION,
C                            ALGORITHM TERMINATION CONDITION NOT MET
C
C***LONG DESCRIPTION
C
C         AI AND DAI ARE COMPUTED FOR CABS(Z).GT.1.0 FROM THE K BESSEL
C         FUNCTIONS BY
C
C            AI(Z)=C*SQRT(Z)*K(1/3,ZTA) , DAI(Z)=-C*Z*K(2/3,ZTA)
C                           C=1.0/(PI*SQRT(3.0))
C                            ZTA=(2/3)*Z**(3/2)
C
C         WITH THE POWER SERIES FOR CABS(Z).LE.1.0.
C
C         IN MOST COMPLEX VARIABLE COMPUTATION, ONE MUST EVALUATE ELE-
C         MENTARY FUNCTIONS. WHEN THE MAGNITUDE OF Z IS LARGE, LOSSES
C         OF SIGNIFICANCE BY ARGUMENT REDUCTION OCCUR. CONSEQUENTLY, IF
C         THE MAGNITUDE OF ZETA=(2/3)*Z**1.5 EXCEEDS U1=SQRT(0.5/UR),
C         THEN LOSSES EXCEEDING HALF PRECISION ARE LIKELY AND AN ERROR
C         FLAG IERR=3 IS TRIGGERED WHERE UR=DMAX1(D1MACH(4),1.0D-18) IS
C         DOUBLE PRECISION UNIT ROUNDOFF LIMITED TO 18 DIGITS PRECISION.
C         ALSO, IF THE MAGNITUDE OF ZETA IS LARGER THAN U2=0.5/UR, THEN
C         ALL SIGNIFICANCE IS LOST AND IERR=4. IN ORDER TO USE THE INT
C         FUNCTION, ZETA MUST BE FURTHER RESTRICTED NOT TO EXCEED THE
C         LARGEST INTEGER, U3=I1MACH(9). THUS, THE MAGNITUDE OF ZETA
C         MUST BE RESTRICTED BY MIN(U2,U3). ON 32 BIT MACHINES, U1,U2,
C         AND U3 ARE APPROXIMATELY 2.0E+3, 4.2E+6, 2.1E+9 IN SINGLE
C         PRECISION ARITHMETIC AND 1.3E+8, 1.8E+16, 2.1E+9 IN DOUBLE
C         PRECISION ARITHMETIC RESPECTIVELY. THIS MAKES U2 AND U3 LIMIT-
C         ING IN THEIR RESPECTIVE ARITHMETICS. THIS MEANS THAT THE MAG-
C         NITUDE OF Z CANNOT EXCEED 3.1E+4 IN SINGLE AND 2.1E+6 IN
C         DOUBLE PRECISION ARITHMETIC. THIS ALSO MEANS THAT ONE CAN
C         EXPECT TO RETAIN, IN THE WORST CASES ON 32 BIT MACHINES,
C         NO DIGITS IN SINGLE PRECISION AND ONLY 7 DIGITS IN DOUBLE
C         PRECISION ARITHMETIC. SIMILAR CONSIDERATIONS HOLD FOR OTHER
C         MACHINES.
C
C         THE APPROXIMATE RELATIVE ERROR IN THE MAGNITUDE OF A COMPLEX
C         BESSEL FUNCTION CAN BE EXPRESSED BY P*10**S WHERE P=MAX(UNIT
C         ROUNDOFF,1.0E-18) IS THE NOMINAL PRECISION AND 10**S REPRE-
C         SENTS THE INCREASE IN ERROR DUE TO ARGUMENT REDUCTION IN THE
C         ELEMENTARY FUNCTIONS. HERE, S=MAX(1,ABS(LOG10(CABS(Z))),
C         ABS(LOG10(FNU))) APPROXIMATELY (I.E. S=MAX(1,ABS(EXPONENT OF
C         CABS(Z),ABS(EXPONENT OF FNU)) ). HOWEVER, THE PHASE ANGLE MAY
C         HAVE ONLY ABSOLUTE ACCURACY. THIS IS MOST LIKELY TO OCCUR WHEN
C         ONE COMPONENT (IN ABSOLUTE VALUE) IS LARGER THAN THE OTHER BY
C         SEVERAL ORDERS OF MAGNITUDE. IF ONE COMPONENT IS 10**K LARGER
C         THAN THE OTHER, THEN ONE CAN EXPECT ONLY MAX(ABS(LOG10(P))-K,
C         0) SIGNIFICANT DIGITS; OR, STATED ANOTHER WAY, WHEN K EXCEEDS
C         THE EXPONENT OF P, NO SIGNIFICANT DIGITS REMAIN IN THE SMALLER
C         COMPONENT. HOWEVER, THE PHASE ANGLE RETAINS ABSOLUTE ACCURACY
C         BECAUSE, IN COMPLEX ARITHMETIC WITH PRECISION P, THE SMALLER
C         COMPONENT WILL NOT (AS A RULE) DECREASE BELOW P TIMES THE
C         MAGNITUDE OF THE LARGER COMPONENT. IN THESE EXTREME CASES,
C         THE PRINCIPAL PHASE ANGLE IS ON THE ORDER OF +P, -P, PI/2-P,
C         OR -PI/2+P.
C
C***REFERENCES  HANDBOOK OF MATHEMATICAL FUNCTIONS BY M. ABRAMOWITZ
C                 AND I. A. STEGUN, NBS AMS SERIES 55, U.S. DEPT. OF
C                 COMMERCE, 1955.
C
C               COMPUTATION OF BESSEL FUNCTIONS OF COMPLEX ARGUMENT
C                 AND LARGE ORDER BY D. E. AMOS, SAND83-0643, MAY, 1983
C
C               A SUBROUTINE PACKAGE FOR BESSEL FUNCTIONS OF A COMPLEX
C                 ARGUMENT AND NONNEGATIVE ORDER BY D. E. AMOS, SAND85-
C                 1018, MAY, 1985
C
C               A PORTABLE PACKAGE FOR BESSEL FUNCTIONS OF A COMPLEX
C                 ARGUMENT AND NONNEGATIVE ORDER BY D. E. AMOS, TRANS.
C                 MATH. SOFTWARE, 1986
C
C***ROUTINES CALLED  ZACAI,ZBKNU,AZEXP,AZSQRT,I1MACH,D1MACH
C***END PROLOGUE  ZAIRY
C     COMPLEX AI,CONE,CSQ,CY,S1,S2,TRM1,TRM2,Z,ZTA,Z3
      DOUBLE PRECISION AA, AD, AII, AIR, AK, ALIM, ATRM, AZ, AZ3, BK,
     * CC, CK, COEF, CONEI, CONER, CSQI, CSQR, CYI, CYR, C1, C2, DIG,
     * DK, D1, D2, ELIM, FID, FNU, PTR, RL, R1M5, SFAC, STI, STR,
     * S1I, S1R, S2I, S2R, TOL, TRM1I, TRM1R, TRM2I, TRM2R, TTH, ZEROI,
     * ZEROR, ZI, ZR, ZTAI, ZTAR, Z3I, Z3R, D1MACH, AZABS, ALAZ, BB
      INTEGER ID, IERR, IFLAG, K, KODE, K1, K2, MR, NN, NZ, I1MACH
      DIMENSION CYR(1), CYI(1)
      DATA TTH, C1, C2, COEF /6.66666666666666667D-01,
     * 3.55028053887817240D-01,2.58819403792806799D-01,
     * 1.83776298473930683D-01/
      DATA ZEROR, ZEROI, CONER, CONEI /0.0D0,0.0D0,1.0D0,0.0D0/
C***FIRST EXECUTABLE STATEMENT  ZAIRY
      IERR = 0
      NZ=0
      IF (ID.LT.0 .OR. ID.GT.1) IERR=1
      IF (KODE.LT.1 .OR. KODE.GT.2) IERR=1
      IF (IERR.NE.0) RETURN
      AZ = AZABS(ZR,ZI)
      TOL = DMAX1(D1MACH(4),1.0D-18)
      FID = DBLE(FLOAT(ID))
      IF (AZ.GT.1.0D0) GO TO 70
C-----------------------------------------------------------------------
C     POWER SERIES FOR CABS(Z).LE.1.
C-----------------------------------------------------------------------
      S1R = CONER
      S1I = CONEI
      S2R = CONER
      S2I = CONEI
      IF (AZ.LT.TOL) GO TO 170
      AA = AZ*AZ
      IF (AA.LT.TOL/AZ) GO TO 40
      TRM1R = CONER
      TRM1I = CONEI
      TRM2R = CONER
      TRM2I = CONEI
      ATRM = 1.0D0
      STR = ZR*ZR - ZI*ZI
      STI = ZR*ZI + ZI*ZR
      Z3R = STR*ZR - STI*ZI
      Z3I = STR*ZI + STI*ZR
      AZ3 = AZ*AA
      AK = 2.0D0 + FID
      BK = 3.0D0 - FID - FID
      CK = 4.0D0 - FID
      DK = 3.0D0 + FID + FID
      D1 = AK*DK
      D2 = BK*CK
      AD = DMIN1(D1,D2)
      AK = 24.0D0 + 9.0D0*FID
      BK = 30.0D0 - 9.0D0*FID
      DO 30 K=1,25
        STR = (TRM1R*Z3R-TRM1I*Z3I)/D1
        TRM1I = (TRM1R*Z3I+TRM1I*Z3R)/D1
        TRM1R = STR
        S1R = S1R + TRM1R
        S1I = S1I + TRM1I
        STR = (TRM2R*Z3R-TRM2I*Z3I)/D2
        TRM2I = (TRM2R*Z3I+TRM2I*Z3R)/D2
        TRM2R = STR
        S2R = S2R + TRM2R
        S2I = S2I + TRM2I
        ATRM = ATRM*AZ3/AD
        D1 = D1 + AK
        D2 = D2 + BK
        AD = DMIN1(D1,D2)
        IF (ATRM.LT.TOL*AD) GO TO 40
        AK = AK + 18.0D0
        BK = BK + 18.0D0
   30 CONTINUE
   40 CONTINUE
      IF (ID.EQ.1) GO TO 50
      AIR = S1R*C1 - C2*(ZR*S2R-ZI*S2I)
      AII = S1I*C1 - C2*(ZR*S2I+ZI*S2R)
      IF (KODE.EQ.1) RETURN
      CALL AZSQRT(ZR, ZI, STR, STI)
      ZTAR = TTH*(ZR*STR-ZI*STI)
      ZTAI = TTH*(ZR*STI+ZI*STR)
      CALL AZEXP(ZTAR, ZTAI, STR, STI)
      PTR = AIR*STR - AII*STI
      AII = AIR*STI + AII*STR
      AIR = PTR
      RETURN
   50 CONTINUE
      AIR = -S2R*C2
      AII = -S2I*C2
      IF (AZ.LE.TOL) GO TO 60
      STR = ZR*S1R - ZI*S1I
      STI = ZR*S1I + ZI*S1R
      CC = C1/(1.0D0+FID)
      AIR = AIR + CC*(STR*ZR-STI*ZI)
      AII = AII + CC*(STR*ZI+STI*ZR)
   60 CONTINUE
      IF (KODE.EQ.1) RETURN
      CALL AZSQRT(ZR, ZI, STR, STI)
      ZTAR = TTH*(ZR*STR-ZI*STI)
      ZTAI = TTH*(ZR*STI+ZI*STR)
      CALL AZEXP(ZTAR, ZTAI, STR, STI)
      PTR = STR*AIR - STI*AII
      AII = STR*AII + STI*AIR
      AIR = PTR
      RETURN
C-----------------------------------------------------------------------
C     CASE FOR CABS(Z).GT.1.0
C-----------------------------------------------------------------------
   70 CONTINUE
      FNU = (1.0D0+FID)/3.0D0
C-----------------------------------------------------------------------
C     SET PARAMETERS RELATED TO MACHINE CONSTANTS.
C     TOL IS THE APPROXIMATE UNIT ROUNDOFF LIMITED TO 1.0D-18.
C     ELIM IS THE APPROXIMATE EXPONENTIAL OVER- AND UNDERFLOW LIMIT.
C     EXP(-ELIM).LT.EXP(-ALIM)=EXP(-ELIM)/TOL    AND
C     EXP(ELIM).GT.EXP(ALIM)=EXP(ELIM)*TOL       ARE INTERVALS NEAR
C     UNDERFLOW AND OVERFLOW LIMITS WHERE SCALED ARITHMETIC IS DONE.
C     RL IS THE LOWER BOUNDARY OF THE ASYMPTOTIC EXPANSION FOR LARGE Z.
C     DIG = NUMBER OF BASE 10 DIGITS IN TOL = 10**(-DIG).
C-----------------------------------------------------------------------
      K1 = I1MACH(15)
      K2 = I1MACH(16)
      R1M5 = D1MACH(5)
      K = MIN0(IABS(K1),IABS(K2))
      ELIM = 2.303D0*(DBLE(FLOAT(K))*R1M5-3.0D0)
      K1 = I1MACH(14) - 1
      AA = R1M5*DBLE(FLOAT(K1))
      DIG = DMIN1(AA,18.0D0)
      AA = AA*2.303D0
      ALIM = ELIM + DMAX1(-AA,-41.45D0)
      RL = 1.2D0*DIG + 3.0D0
      ALAZ = DLOG(AZ)
C--------------------------------------------------------------------------
C     TEST FOR PROPER RANGE
C-----------------------------------------------------------------------
      AA=0.5D0/TOL
      BB=DBLE(FLOAT(I1MACH(9)))*0.5D0
      AA=DMIN1(AA,BB)
      AA=AA**TTH
      IF (AZ.GT.AA) GO TO 260
      AA=DSQRT(AA)
      IF (AZ.GT.AA) IERR=3
      CALL AZSQRT(ZR, ZI, CSQR, CSQI)
      ZTAR = TTH*(ZR*CSQR-ZI*CSQI)
      ZTAI = TTH*(ZR*CSQI+ZI*CSQR)
C-----------------------------------------------------------------------
C     RE(ZTA).LE.0 WHEN RE(Z).LT.0, ESPECIALLY WHEN IM(Z) IS SMALL
C-----------------------------------------------------------------------
      IFLAG = 0
      SFAC = 1.0D0
      AK = ZTAI
      IF (ZR.GE.0.0D0) GO TO 80
      BK = ZTAR
      CK = -DABS(BK)
      ZTAR = CK
      ZTAI = AK
   80 CONTINUE
      IF (ZI.NE.0.0D0) GO TO 90
      IF (ZR.GT.0.0D0) GO TO 90
      ZTAR = 0.0D0
      ZTAI = AK
   90 CONTINUE
      AA = ZTAR
      IF (AA.GE.0.0D0 .AND. ZR.GT.0.0D0) GO TO 110
      IF (KODE.EQ.2) GO TO 100
C-----------------------------------------------------------------------
C     OVERFLOW TEST
C-----------------------------------------------------------------------
      IF (AA.GT.(-ALIM)) GO TO 100
      AA = -AA + 0.25D0*ALAZ
      IFLAG = 1
      SFAC = TOL
      IF (AA.GT.ELIM) GO TO 270
  100 CONTINUE
C-----------------------------------------------------------------------
C     CBKNU AND CACON RETURN EXP(ZTA)*K(FNU,ZTA) ON KODE=2
C-----------------------------------------------------------------------
      MR = 1
      IF (ZI.LT.0.0D0) MR = -1
      CALL ZACAI(ZTAR, ZTAI, FNU, KODE, MR, 1, CYR, CYI, NN, RL, TOL,
     * ELIM, ALIM)
      IF (NN.LT.0) GO TO 280
      NZ = NZ + NN
      GO TO 130
  110 CONTINUE
      IF (KODE.EQ.2) GO TO 120
C-----------------------------------------------------------------------
C     UNDERFLOW TEST
C-----------------------------------------------------------------------
      IF (AA.LT.ALIM) GO TO 120
      AA = -AA - 0.25D0*ALAZ
      IFLAG = 2
      SFAC = 1.0D0/TOL
      IF (AA.LT.(-ELIM)) GO TO 210
  120 CONTINUE
      CALL ZBKNU(ZTAR, ZTAI, FNU, KODE, 1, CYR, CYI, NZ, TOL, ELIM,
     * ALIM)
  130 CONTINUE
      S1R = CYR(1)*COEF
      S1I = CYI(1)*COEF
      IF (IFLAG.NE.0) GO TO 150
      IF (ID.EQ.1) GO TO 140
      AIR = CSQR*S1R - CSQI*S1I
      AII = CSQR*S1I + CSQI*S1R
      RETURN
  140 CONTINUE
      AIR = -(ZR*S1R-ZI*S1I)
      AII = -(ZR*S1I+ZI*S1R)
      RETURN
  150 CONTINUE
      S1R = S1R*SFAC
      S1I = S1I*SFAC
      IF (ID.EQ.1) GO TO 160
      STR = S1R*CSQR - S1I*CSQI
      S1I = S1R*CSQI + S1I*CSQR
      S1R = STR
      AIR = S1R/SFAC
      AII = S1I/SFAC
      RETURN
  160 CONTINUE
      STR = -(S1R*ZR-S1I*ZI)
      S1I = -(S1R*ZI+S1I*ZR)
      S1R = STR
      AIR = S1R/SFAC
      AII = S1I/SFAC
      RETURN
  170 CONTINUE
      AA = 1.0D+3*D1MACH(1)
      S1R = ZEROR
      S1I = ZEROI
      IF (ID.EQ.1) GO TO 190
      IF (AZ.LE.AA) GO TO 180
      S1R = C2*ZR
      S1I = C2*ZI
  180 CONTINUE
      AIR = C1 - S1R
      AII = -S1I
      RETURN
  190 CONTINUE
      AIR = -C2
      AII = 0.0D0
      AA = DSQRT(AA)
      IF (AZ.LE.AA) GO TO 200
      S1R = 0.5D0*(ZR*ZR-ZI*ZI)
      S1I = ZR*ZI
  200 CONTINUE
      AIR = AIR + C1*S1R
      AII = AII + C1*S1I
      RETURN
  210 CONTINUE
      NZ = 1
      AIR = ZEROR
      AII = ZEROI
      RETURN
  270 CONTINUE
      NZ = 0
      IERR=2
      RETURN
  280 CONTINUE
      IF(NN.EQ.(-1)) GO TO 270
      NZ=0
      IERR=5
      RETURN
  260 CONTINUE
      IERR=4
      NZ=0
      RETURN
      END
      SUBROUTINE ZASYI(ZR, ZI, FNU, KODE, N, YR, YI, NZ, RL, TOL, ELIM,
     * ALIM)
C***BEGIN PROLOGUE  ZASYI
C***REFER TO  ZBESI,ZBESK
C
C     ZASYI COMPUTES THE I BESSEL FUNCTION FOR REAL(Z).GE.0.0 BY
C     MEANS OF THE ASYMPTOTIC EXPANSION FOR LARGE CABS(Z) IN THE
C     REGION CABS(Z).GT.MAX(RL,FNU*FNU/2). NZ=0 IS A NORMAL RETURN.
C     NZ.LT.0 INDICATES AN OVERFLOW ON KODE=1.
C
C***ROUTINES CALLED  D1MACH,AZABS,ZDIV,AZEXP,ZMLT,AZSQRT
C***END PROLOGUE  ZASYI
C     COMPLEX AK1,CK,CONE,CS1,CS2,CZ,CZERO,DK,EZ,P1,RZ,S2,Y,Z
      DOUBLE PRECISION AA, AEZ, AK, AK1I, AK1R, ALIM, ARG, ARM, ATOL,
     * AZ, BB, BK, CKI, CKR, CONEI, CONER, CS1I, CS1R, CS2I, CS2R, CZI,
     * CZR, DFNU, DKI, DKR, DNU2, ELIM, EZI, EZR, FDN, FNU, PI, P1I,
     * P1R, RAZ, RL, RTPI, RTR1, RZI, RZR, S, SGN, SQK, STI, STR, S2I,
     * S2R, TOL, TZI, TZR, YI, YR, ZEROI, ZEROR, ZI, ZR, D1MACH, AZABS
      INTEGER I, IB, IL, INU, J, JL, K, KODE, KODED, M, N, NN, NZ
      DIMENSION YR(N), YI(N)
      DATA PI, RTPI  /3.14159265358979324D0 , 0.159154943091895336D0 /
      DATA ZEROR,ZEROI,CONER,CONEI / 0.0D0, 0.0D0, 1.0D0, 0.0D0 /
C
      NZ = 0
      AZ = AZABS(ZR,ZI)
      ARM = 1.0D+3*D1MACH(1)
      RTR1 = DSQRT(ARM)
      IL = MIN0(2,N)
      DFNU = FNU + DBLE(FLOAT(N-IL))
C-----------------------------------------------------------------------
C     OVERFLOW TEST
C-----------------------------------------------------------------------
      RAZ = 1.0D0/AZ
      STR = ZR*RAZ
      STI = -ZI*RAZ
      AK1R = RTPI*STR*RAZ
      AK1I = RTPI*STI*RAZ
      CALL AZSQRT(AK1R, AK1I, AK1R, AK1I)
      CZR = ZR
      CZI = ZI
      IF (KODE.NE.2) GO TO 10
      CZR = ZEROR
      CZI = ZI
   10 CONTINUE
      IF (DABS(CZR).GT.ELIM) GO TO 100
      DNU2 = DFNU + DFNU
      KODED = 1
      IF ((DABS(CZR).GT.ALIM) .AND. (N.GT.2)) GO TO 20
      KODED = 0
      CALL AZEXP(CZR, CZI, STR, STI)
      CALL ZMLT(AK1R, AK1I, STR, STI, AK1R, AK1I)
   20 CONTINUE
      FDN = 0.0D0
      IF (DNU2.GT.RTR1) FDN = DNU2*DNU2
      EZR = ZR*8.0D0
      EZI = ZI*8.0D0
C-----------------------------------------------------------------------
C     WHEN Z IS IMAGINARY, THE ERROR TEST MUST BE MADE RELATIVE TO THE
C     FIRST RECIPROCAL POWER SINCE THIS IS THE LEADING TERM OF THE
C     EXPANSION FOR THE IMAGINARY PART.
C-----------------------------------------------------------------------
      AEZ = 8.0D0*AZ
      S = TOL/AEZ
      JL = INT(SNGL(RL+RL)) + 2
      P1R = ZEROR
      P1I = ZEROI
      IF (ZI.EQ.0.0D0) GO TO 30
C-----------------------------------------------------------------------
C     CALCULATE EXP(PI*(0.5+FNU+N-IL)*I) TO MINIMIZE LOSSES OF
C     SIGNIFICANCE WHEN FNU OR N IS LARGE
C-----------------------------------------------------------------------
      INU = INT(SNGL(FNU))
      ARG = (FNU-DBLE(FLOAT(INU)))*PI
      INU = INU + N - IL
      AK = -DSIN(ARG)
      BK = DCOS(ARG)
      IF (ZI.LT.0.0D0) BK = -BK
      P1R = AK
      P1I = BK
      IF (MOD(INU,2).EQ.0) GO TO 30
      P1R = -P1R
      P1I = -P1I
   30 CONTINUE
      DO 70 K=1,IL
        SQK = FDN - 1.0D0
        ATOL = S*DABS(SQK)
        SGN = 1.0D0
        CS1R = CONER
        CS1I = CONEI
        CS2R = CONER
        CS2I = CONEI
        CKR = CONER
        CKI = CONEI
        AK = 0.0D0
        AA = 1.0D0
        BB = AEZ
        DKR = EZR
        DKI = EZI
        DO 40 J=1,JL
          CALL ZDIV(CKR, CKI, DKR, DKI, STR, STI)
          CKR = STR*SQK
          CKI = STI*SQK
          CS2R = CS2R + CKR
          CS2I = CS2I + CKI
          SGN = -SGN
          CS1R = CS1R + CKR*SGN
          CS1I = CS1I + CKI*SGN
          DKR = DKR + EZR
          DKI = DKI + EZI
          AA = AA*DABS(SQK)/BB
          BB = BB + AEZ
          AK = AK + 8.0D0
          SQK = SQK - AK
          IF (AA.LE.ATOL) GO TO 50
   40   CONTINUE
        GO TO 110
   50   CONTINUE
        S2R = CS1R
        S2I = CS1I
        IF (ZR+ZR.GE.ELIM) GO TO 60
        TZR = ZR + ZR
        TZI = ZI + ZI
        CALL AZEXP(-TZR, -TZI, STR, STI)
        CALL ZMLT(STR, STI, P1R, P1I, STR, STI)
        CALL ZMLT(STR, STI, CS2R, CS2I, STR, STI)
        S2R = S2R + STR
        S2I = S2I + STI
   60   CONTINUE
        FDN = FDN + 8.0D0*DFNU + 4.0D0
        P1R = -P1R
        P1I = -P1I
        M = N - IL + K
        YR(M) = S2R*AK1R - S2I*AK1I
        YI(M) = S2R*AK1I + S2I*AK1R
   70 CONTINUE
      IF (N.LE.2) RETURN
      NN = N
      K = NN - 2
      AK = DBLE(FLOAT(K))
      STR = ZR*RAZ
      STI = -ZI*RAZ
      RZR = (STR+STR)*RAZ
      RZI = (STI+STI)*RAZ
      IB = 3
      DO 80 I=IB,NN
        YR(K) = (AK+FNU)*(RZR*YR(K+1)-RZI*YI(K+1)) + YR(K+2)
        YI(K) = (AK+FNU)*(RZR*YI(K+1)+RZI*YR(K+1)) + YI(K+2)
        AK = AK - 1.0D0
        K = K - 1
   80 CONTINUE
      IF (KODED.EQ.0) RETURN
      CALL AZEXP(CZR, CZI, CKR, CKI)
      DO 90 I=1,NN
        STR = YR(I)*CKR - YI(I)*CKI
        YI(I) = YR(I)*CKI + YI(I)*CKR
        YR(I) = STR
   90 CONTINUE
      RETURN
  100 CONTINUE
      NZ = -1
      RETURN
  110 CONTINUE
      NZ=-2
      RETURN
      END
      SUBROUTINE ZBINU(ZR, ZI, FNU, KODE, N, CYR, CYI, NZ, RL, FNUL,
     * TOL, ELIM, ALIM)
C***BEGIN PROLOGUE  ZBINU
C***REFER TO  ZBESH,ZBESI,ZBESJ,ZBESK,ZAIRY,ZBIRY
C
C     ZBINU COMPUTES THE I FUNCTION IN THE RIGHT HALF Z PLANE
C
C***ROUTINES CALLED  AZABS,ZASYI,ZBUNI,ZMLRI,ZSERI,ZUOIK,ZWRSK
C***END PROLOGUE  ZBINU
      DOUBLE PRECISION ALIM, AZ, CWI, CWR, CYI, CYR, DFNU, ELIM, FNU,
     * FNUL, RL, TOL, ZEROI, ZEROR, ZI, ZR, AZABS
      INTEGER I, INW, KODE, N, NLAST, NN, NUI, NW, NZ
      DIMENSION CYR(N), CYI(N), CWR(2), CWI(2)
      DATA ZEROR,ZEROI / 0.0D0, 0.0D0 /
C
      NZ = 0
      AZ = AZABS(ZR,ZI)
      NN = N
      DFNU = FNU + DBLE(FLOAT(N-1))
      IF (AZ.LE.2.0D0) GO TO 10
      IF (AZ*AZ*0.25D0.GT.DFNU+1.0D0) GO TO 20
   10 CONTINUE
C-----------------------------------------------------------------------
C     POWER SERIES
C-----------------------------------------------------------------------
      CALL ZSERI(ZR, ZI, FNU, KODE, NN, CYR, CYI, NW, TOL, ELIM, ALIM)
      INW = IABS(NW)
      NZ = NZ + INW
      NN = NN - INW
      IF (NN.EQ.0) RETURN
      IF (NW.GE.0) GO TO 120
      DFNU = FNU + DBLE(FLOAT(NN-1))
   20 CONTINUE
      IF (AZ.LT.RL) GO TO 40
      IF (DFNU.LE.1.0D0) GO TO 30
      IF (AZ+AZ.LT.DFNU*DFNU) GO TO 50
C-----------------------------------------------------------------------
C     ASYMPTOTIC EXPANSION FOR LARGE Z
C-----------------------------------------------------------------------
   30 CONTINUE
      CALL ZASYI(ZR, ZI, FNU, KODE, NN, CYR, CYI, NW, RL, TOL, ELIM,
     * ALIM)
      IF (NW.LT.0) GO TO 130
      GO TO 120
   40 CONTINUE
      IF (DFNU.LE.1.0D0) GO TO 70
   50 CONTINUE
C-----------------------------------------------------------------------
C     OVERFLOW AND UNDERFLOW TEST ON I SEQUENCE FOR MILLER ALGORITHM
C-----------------------------------------------------------------------
      CALL ZUOIK(ZR, ZI, FNU, KODE, 1, NN, CYR, CYI, NW, TOL, ELIM,
     * ALIM)
      IF (NW.LT.0) GO TO 130
      NZ = NZ + NW
      NN = NN - NW
      IF (NN.EQ.0) RETURN
      DFNU = FNU+DBLE(FLOAT(NN-1))
      IF (DFNU.GT.FNUL) GO TO 110
      IF (AZ.GT.FNUL) GO TO 110
   60 CONTINUE
      IF (AZ.GT.RL) GO TO 80
   70 CONTINUE
C-----------------------------------------------------------------------
C     MILLER ALGORITHM NORMALIZED BY THE SERIES
C-----------------------------------------------------------------------
      CALL ZMLRI(ZR, ZI, FNU, KODE, NN, CYR, CYI, NW, TOL)
      IF(NW.LT.0) GO TO 130
      GO TO 120
   80 CONTINUE
C-----------------------------------------------------------------------
C     MILLER ALGORITHM NORMALIZED BY THE WRONSKIAN
C-----------------------------------------------------------------------
C-----------------------------------------------------------------------
C     OVERFLOW TEST ON K FUNCTIONS USED IN WRONSKIAN
C-----------------------------------------------------------------------
      CALL ZUOIK(ZR, ZI, FNU, KODE, 2, 2, CWR, CWI, NW, TOL, ELIM,
     * ALIM)
      IF (NW.GE.0) GO TO 100
      NZ = NN
      DO 90 I=1,NN
        CYR(I) = ZEROR
        CYI(I) = ZEROI
   90 CONTINUE
      RETURN
  100 CONTINUE
      IF (NW.GT.0) GO TO 130
      CALL ZWRSK(ZR, ZI, FNU, KODE, NN, CYR, CYI, NW, CWR, CWI, TOL,
     * ELIM, ALIM)
      IF (NW.LT.0) GO TO 130
      GO TO 120
  110 CONTINUE
C-----------------------------------------------------------------------
C     INCREMENT FNU+NN-1 UP TO FNUL, COMPUTE AND RECUR BACKWARD
C-----------------------------------------------------------------------
      NUI = INT(SNGL(FNUL-DFNU)) + 1
      NUI = MAX0(NUI,0)
      CALL ZBUNI(ZR, ZI, FNU, KODE, NN, CYR, CYI, NW, NUI, NLAST, FNUL,
     * TOL, ELIM, ALIM)
      IF (NW.LT.0) GO TO 130
      NZ = NZ + NW
      IF (NLAST.EQ.0) GO TO 120
      NN = NLAST
      GO TO 60
  120 CONTINUE
      RETURN
  130 CONTINUE
      NZ = -1
      IF(NW.EQ.(-2)) NZ=-2
      RETURN
      END
      SUBROUTINE ZBKNU(ZR, ZI, FNU, KODE, N, YR, YI, NZ, TOL, ELIM,
     * ALIM)
C***BEGIN PROLOGUE  ZBKNU
C***REFER TO  ZBESI,ZBESK,ZAIRY,ZBESH
C
C     ZBKNU COMPUTES THE K BESSEL FUNCTION IN THE RIGHT HALF Z PLANE.
C
C***ROUTINES CALLED  DGAMLN,I1MACH,D1MACH,ZKSCL,ZSHCH,ZUCHK,AZABS,ZDIV,
C                    AZEXP,AZLOG,ZMLT,AZSQRT
C***END PROLOGUE  ZBKNU
C
      DOUBLE PRECISION AA, AK, ALIM, ASCLE, A1, A2, BB, BK, BRY, CAZ,
     * CBI, CBR, CC, CCHI, CCHR, CKI, CKR, COEFI, COEFR, CONEI, CONER,
     * CRSCR, CSCLR, CSHI, CSHR, CSI, CSR, CSRR, CSSR, CTWOR,
     * CZEROI, CZEROR, CZI, CZR, DNU, DNU2, DPI, ELIM, ETEST, FC, FHS,
     * FI, FK, FKS, FMUI, FMUR, FNU, FPI, FR, G1, G2, HPI, PI, PR, PTI,
     * PTR, P1I, P1R, P2I, P2M, P2R, QI, QR, RAK, RCAZ, RTHPI, RZI,
     * RZR, R1, S, SMUI, SMUR, SPI, STI, STR, S1I, S1R, S2I, S2R, TM,
     * TOL, TTH, T1, T2, YI, YR, ZI, ZR, DGAMLN, D1MACH, AZABS, ELM,
     * CELMR, ZDR, ZDI, AS, ALAS, HELIM, CYR, CYI
      INTEGER I, IFLAG, INU, K, KFLAG, KK, KMAX, KODE, KODED, N, NZ,
     * IDUM, I1MACH, J, IC, INUB, NW
      DIMENSION YR(N), YI(N), CC(8), CSSR(3), CSRR(3), BRY(3), CYR(2),
     * CYI(2)
C     COMPLEX Z,Y,A,B,RZ,SMU,FU,FMU,F,FLRZ,CZ,S1,S2,CSH,CCH
C     COMPLEX CK,P,Q,COEF,P1,P2,CBK,PT,CZERO,CONE,CTWO,ST,EZ,CS,DK
C
      DATA KMAX / 30 /
      DATA CZEROR,CZEROI,CONER,CONEI,CTWOR,R1/
     1  0.0D0 , 0.0D0 , 1.0D0 , 0.0D0 , 2.0D0 , 2.0D0 /
      DATA DPI, RTHPI, SPI ,HPI, FPI, TTH /
     1     3.14159265358979324D0,       1.25331413731550025D0,
     2     1.90985931710274403D0,       1.57079632679489662D0,
     3     1.89769999331517738D0,       6.66666666666666666D-01/
      DATA CC(1), CC(2), CC(3), CC(4), CC(5), CC(6), CC(7), CC(8)/
     1     5.77215664901532861D-01,    -4.20026350340952355D-02,
     2    -4.21977345555443367D-02,     7.21894324666309954D-03,
     3    -2.15241674114950973D-04,    -2.01348547807882387D-05,
     4     1.13302723198169588D-06,     6.11609510448141582D-09/
C
      CAZ = AZABS(ZR,ZI)
      CSCLR = 1.0D0/TOL
      CRSCR = TOL
      CSSR(1) = CSCLR
      CSSR(2) = 1.0D0
      CSSR(3) = CRSCR
      CSRR(1) = CRSCR
      CSRR(2) = 1.0D0
      CSRR(3) = CSCLR
      BRY(1) = 1.0D+3*D1MACH(1)/TOL
      BRY(2) = 1.0D0/BRY(1)
      BRY(3) = D1MACH(2)
      NZ = 0
      IFLAG = 0
      KODED = KODE
      RCAZ = 1.0D0/CAZ
      STR = ZR*RCAZ
      STI = -ZI*RCAZ
      RZR = (STR+STR)*RCAZ
      RZI = (STI+STI)*RCAZ
      INU = INT(SNGL(FNU+0.5D0))
      DNU = FNU - DBLE(FLOAT(INU))
      IF (DABS(DNU).EQ.0.5D0) GO TO 110
      DNU2 = 0.0D0
      IF (DABS(DNU).GT.TOL) DNU2 = DNU*DNU
      IF (CAZ.GT.R1) GO TO 110
C-----------------------------------------------------------------------
C     SERIES FOR CABS(Z).LE.R1
C-----------------------------------------------------------------------
      FC = 1.0D0
      CALL AZLOG(RZR, RZI, SMUR, SMUI, IDUM)
      FMUR = SMUR*DNU
      FMUI = SMUI*DNU
      CALL ZSHCH(FMUR, FMUI, CSHR, CSHI, CCHR, CCHI)
      IF (DNU.EQ.0.0D0) GO TO 10
      FC = DNU*DPI
      FC = FC/DSIN(FC)
      SMUR = CSHR/DNU
      SMUI = CSHI/DNU
   10 CONTINUE
      A2 = 1.0D0 + DNU
C-----------------------------------------------------------------------
C     GAM(1-Z)*GAM(1+Z)=PI*Z/SIN(PI*Z), T1=1/GAM(1-DNU), T2=1/GAM(1+DNU)
C-----------------------------------------------------------------------
      T2 = DEXP(-DGAMLN(A2,IDUM))
      T1 = 1.0D0/(T2*FC)
      IF (DABS(DNU).GT.0.1D0) GO TO 40
C-----------------------------------------------------------------------
C     SERIES FOR F0 TO RESOLVE INDETERMINACY FOR SMALL ABS(DNU)
C-----------------------------------------------------------------------
      AK = 1.0D0
      S = CC(1)
      DO 20 K=2,8
        AK = AK*DNU2
        TM = CC(K)*AK
        S = S + TM
        IF (DABS(TM).LT.TOL) GO TO 30
   20 CONTINUE
   30 G1 = -S
      GO TO 50
   40 CONTINUE
      G1 = (T1-T2)/(DNU+DNU)
   50 CONTINUE
      G2 = (T1+T2)*0.5D0
      FR = FC*(CCHR*G1+SMUR*G2)
      FI = FC*(CCHI*G1+SMUI*G2)
      CALL AZEXP(FMUR, FMUI, STR, STI)
      PR = 0.5D0*STR/T2
      PI = 0.5D0*STI/T2
      CALL ZDIV(0.5D0, 0.0D0, STR, STI, PTR, PTI)
      QR = PTR/T1
      QI = PTI/T1
      S1R = FR
      S1I = FI
      S2R = PR
      S2I = PI
      AK = 1.0D0
      A1 = 1.0D0
      CKR = CONER
      CKI = CONEI
      BK = 1.0D0 - DNU2
      IF (INU.GT.0 .OR. N.GT.1) GO TO 80
C-----------------------------------------------------------------------
C     GENERATE K(FNU,Z), 0.0D0 .LE. FNU .LT. 0.5D0 AND N=1
C-----------------------------------------------------------------------
      IF (CAZ.LT.TOL) GO TO 70
      CALL ZMLT(ZR, ZI, ZR, ZI, CZR, CZI)
      CZR = 0.25D0*CZR
      CZI = 0.25D0*CZI
      T1 = 0.25D0*CAZ*CAZ
   60 CONTINUE
      FR = (FR*AK+PR+QR)/BK
      FI = (FI*AK+PI+QI)/BK
      STR = 1.0D0/(AK-DNU)
      PR = PR*STR
      PI = PI*STR
      STR = 1.0D0/(AK+DNU)
      QR = QR*STR
      QI = QI*STR
      STR = CKR*CZR - CKI*CZI
      RAK = 1.0D0/AK
      CKI = (CKR*CZI+CKI*CZR)*RAK
      CKR = STR*RAK
      S1R = CKR*FR - CKI*FI + S1R
      S1I = CKR*FI + CKI*FR + S1I
      A1 = A1*T1*RAK
      BK = BK + AK + AK + 1.0D0
      AK = AK + 1.0D0
      IF (A1.GT.TOL) GO TO 60
   70 CONTINUE
      YR(1) = S1R
      YI(1) = S1I
      IF (KODED.EQ.1) RETURN
      CALL AZEXP(ZR, ZI, STR, STI)
      CALL ZMLT(S1R, S1I, STR, STI, YR(1), YI(1))
      RETURN
C-----------------------------------------------------------------------
C     GENERATE K(DNU,Z) AND K(DNU+1,Z) FOR FORWARD RECURRENCE
C-----------------------------------------------------------------------
   80 CONTINUE
      IF (CAZ.LT.TOL) GO TO 100
      CALL ZMLT(ZR, ZI, ZR, ZI, CZR, CZI)
      CZR = 0.25D0*CZR
      CZI = 0.25D0*CZI
      T1 = 0.25D0*CAZ*CAZ
   90 CONTINUE
      FR = (FR*AK+PR+QR)/BK
      FI = (FI*AK+PI+QI)/BK
      STR = 1.0D0/(AK-DNU)
      PR = PR*STR
      PI = PI*STR
      STR = 1.0D0/(AK+DNU)
      QR = QR*STR
      QI = QI*STR
      STR = CKR*CZR - CKI*CZI
      RAK = 1.0D0/AK
      CKI = (CKR*CZI+CKI*CZR)*RAK
      CKR = STR*RAK
      S1R = CKR*FR - CKI*FI + S1R
      S1I = CKR*FI + CKI*FR + S1I
      STR = PR - FR*AK
      STI = PI - FI*AK
      S2R = CKR*STR - CKI*STI + S2R
      S2I = CKR*STI + CKI*STR + S2I
      A1 = A1*T1*RAK
      BK = BK + AK + AK + 1.0D0
      AK = AK + 1.0D0
      IF (A1.GT.TOL) GO TO 90
  100 CONTINUE
      KFLAG = 2
      A1 = FNU + 1.0D0
      AK = A1*DABS(SMUR)
      IF (AK.GT.ALIM) KFLAG = 3
      STR = CSSR(KFLAG)
      P2R = S2R*STR
      P2I = S2I*STR
      CALL ZMLT(P2R, P2I, RZR, RZI, S2R, S2I)
      S1R = S1R*STR
      S1I = S1I*STR
      IF (KODED.EQ.1) GO TO 210
      CALL AZEXP(ZR, ZI, FR, FI)
      CALL ZMLT(S1R, S1I, FR, FI, S1R, S1I)
      CALL ZMLT(S2R, S2I, FR, FI, S2R, S2I)
      GO TO 210
C-----------------------------------------------------------------------
C     IFLAG=0 MEANS NO UNDERFLOW OCCURRED
C     IFLAG=1 MEANS AN UNDERFLOW OCCURRED- COMPUTATION PROCEEDS WITH
C     KODED=2 AND A TEST FOR ON SCALE VALUES IS MADE DURING FORWARD
C     RECURSION
C-----------------------------------------------------------------------
  110 CONTINUE
      CALL AZSQRT(ZR, ZI, STR, STI)
      CALL ZDIV(RTHPI, CZEROI, STR, STI, COEFR, COEFI)
      KFLAG = 2
      IF (KODED.EQ.2) GO TO 120
      IF (ZR.GT.ALIM) GO TO 290
C     BLANK LINE
      STR = DEXP(-ZR)*CSSR(KFLAG)
      STI = -STR*DSIN(ZI)
      STR = STR*DCOS(ZI)
      CALL ZMLT(COEFR, COEFI, STR, STI, COEFR, COEFI)
  120 CONTINUE
      IF (DABS(DNU).EQ.0.5D0) GO TO 300
C-----------------------------------------------------------------------
C     MILLER ALGORITHM FOR CABS(Z).GT.R1
C-----------------------------------------------------------------------
      AK = DCOS(DPI*DNU)
      AK = DABS(AK)
      IF (AK.EQ.CZEROR) GO TO 300
      FHS = DABS(0.25D0-DNU2)
      IF (FHS.EQ.CZEROR) GO TO 300
C-----------------------------------------------------------------------
C     COMPUTE R2=F(E). IF CABS(Z).GE.R2, USE FORWARD RECURRENCE TO
C     DETERMINE THE BACKWARD INDEX K. R2=F(E) IS A STRAIGHT LINE ON
C     12.LE.E.LE.60. E IS COMPUTED FROM 2**(-E)=B**(1-I1MACH(14))=
C     TOL WHERE B IS THE BASE OF THE ARITHMETIC.
C-----------------------------------------------------------------------
      T1 = DBLE(FLOAT(I1MACH(14)-1))
      T1 = T1*D1MACH(5)*3.321928094D0
      T1 = DMAX1(T1,12.0D0)
      T1 = DMIN1(T1,60.0D0)
      T2 = TTH*T1 - 6.0D0
      IF (ZR.NE.0.0D0) GO TO 130
      T1 = HPI
      GO TO 140
  130 CONTINUE
      T1 = DATAN(ZI/ZR)
      T1 = DABS(T1)
  140 CONTINUE
      IF (T2.GT.CAZ) GO TO 170
C-----------------------------------------------------------------------
C     FORWARD RECURRENCE LOOP WHEN CABS(Z).GE.R2
C-----------------------------------------------------------------------
      ETEST = AK/(DPI*CAZ*TOL)
      FK = CONER
      IF (ETEST.LT.CONER) GO TO 180
      FKS = CTWOR
      CKR = CAZ + CAZ + CTWOR
      P1R = CZEROR
      P2R = CONER
      DO 150 I=1,KMAX
        AK = FHS/FKS
        CBR = CKR/(FK+CONER)
        PTR = P2R
        P2R = CBR*P2R - P1R*AK
        P1R = PTR
        CKR = CKR + CTWOR
        FKS = FKS + FK + FK + CTWOR
        FHS = FHS + FK + FK
        FK = FK + CONER
        STR = DABS(P2R)*FK
        IF (ETEST.LT.STR) GO TO 160
  150 CONTINUE
      GO TO 310
  160 CONTINUE
      FK = FK + SPI*T1*DSQRT(T2/CAZ)
      FHS = DABS(0.25D0-DNU2)
      GO TO 180
  170 CONTINUE
C-----------------------------------------------------------------------
C     COMPUTE BACKWARD INDEX K FOR CABS(Z).LT.R2
C-----------------------------------------------------------------------
      A2 = DSQRT(CAZ)
      AK = FPI*AK/(TOL*DSQRT(A2))
      AA = 3.0D0*T1/(1.0D0+CAZ)
      BB = 14.7D0*T1/(28.0D0+CAZ)
      AK = (DLOG(AK)+CAZ*DCOS(AA)/(1.0D0+0.008D0*CAZ))/DCOS(BB)
      FK = 0.12125D0*AK*AK/CAZ + 1.5D0
  180 CONTINUE
C-----------------------------------------------------------------------
C     BACKWARD RECURRENCE LOOP FOR MILLER ALGORITHM
C-----------------------------------------------------------------------
      K = INT(SNGL(FK))
      FK = DBLE(FLOAT(K))
      FKS = FK*FK
      P1R = CZEROR
      P1I = CZEROI
      P2R = TOL
      P2I = CZEROI
      CSR = P2R
      CSI = P2I
      DO 190 I=1,K
        A1 = FKS - FK
        AK = (FKS+FK)/(A1+FHS)
        RAK = 2.0D0/(FK+CONER)
        CBR = (FK+ZR)*RAK
        CBI = ZI*RAK
        PTR = P2R
        PTI = P2I
        P2R = (PTR*CBR-PTI*CBI-P1R)*AK
        P2I = (PTI*CBR+PTR*CBI-P1I)*AK
        P1R = PTR
        P1I = PTI
        CSR = CSR + P2R
        CSI = CSI + P2I
        FKS = A1 - FK + CONER
        FK = FK - CONER
  190 CONTINUE
C-----------------------------------------------------------------------
C     COMPUTE (P2/CS)=(P2/CABS(CS))*(CONJG(CS)/CABS(CS)) FOR BETTER
C     SCALING
C-----------------------------------------------------------------------
      TM = AZABS(CSR,CSI)
      PTR = 1.0D0/TM
      S1R = P2R*PTR
      S1I = P2I*PTR
      CSR = CSR*PTR
      CSI = -CSI*PTR
      CALL ZMLT(COEFR, COEFI, S1R, S1I, STR, STI)
      CALL ZMLT(STR, STI, CSR, CSI, S1R, S1I)
      IF (INU.GT.0 .OR. N.GT.1) GO TO 200
      ZDR = ZR
      ZDI = ZI
      IF(IFLAG.EQ.1) GO TO 270
      GO TO 240
  200 CONTINUE
C-----------------------------------------------------------------------
C     COMPUTE P1/P2=(P1/CABS(P2)*CONJG(P2)/CABS(P2) FOR SCALING
C-----------------------------------------------------------------------
      TM = AZABS(P2R,P2I)
      PTR = 1.0D0/TM
      P1R = P1R*PTR
      P1I = P1I*PTR
      P2R = P2R*PTR
      P2I = -P2I*PTR
      CALL ZMLT(P1R, P1I, P2R, P2I, PTR, PTI)
      STR = DNU + 0.5D0 - PTR
      STI = -PTI
      CALL ZDIV(STR, STI, ZR, ZI, STR, STI)
      STR = STR + 1.0D0
      CALL ZMLT(STR, STI, S1R, S1I, S2R, S2I)
C-----------------------------------------------------------------------
C     FORWARD RECURSION ON THE THREE TERM RECURSION WITH RELATION WITH
C     SCALING NEAR EXPONENT EXTREMES ON KFLAG=1 OR KFLAG=3
C-----------------------------------------------------------------------
  210 CONTINUE
      STR = DNU + 1.0D0
      CKR = STR*RZR
      CKI = STR*RZI
      IF (N.EQ.1) INU = INU - 1
      IF (INU.GT.0) GO TO 220
      IF (N.GT.1) GO TO 215
      S1R = S2R
      S1I = S2I
  215 CONTINUE
      ZDR = ZR
      ZDI = ZI
      IF(IFLAG.EQ.1) GO TO 270
      GO TO 240
  220 CONTINUE
      INUB = 1
      IF(IFLAG.EQ.1) GO TO 261
  225 CONTINUE
      P1R = CSRR(KFLAG)
      ASCLE = BRY(KFLAG)
      DO 230 I=INUB,INU
        STR = S2R
        STI = S2I
        S2R = CKR*STR - CKI*STI + S1R
        S2I = CKR*STI + CKI*STR + S1I
        S1R = STR
        S1I = STI
        CKR = CKR + RZR
        CKI = CKI + RZI
        IF (KFLAG.GE.3) GO TO 230
        P2R = S2R*P1R
        P2I = S2I*P1R
        STR = DABS(P2R)
        STI = DABS(P2I)
        P2M = DMAX1(STR,STI)
        IF (P2M.LE.ASCLE) GO TO 230
        KFLAG = KFLAG + 1
        ASCLE = BRY(KFLAG)
        S1R = S1R*P1R
        S1I = S1I*P1R
        S2R = P2R
        S2I = P2I
        STR = CSSR(KFLAG)
        S1R = S1R*STR
        S1I = S1I*STR
        S2R = S2R*STR
        S2I = S2I*STR
        P1R = CSRR(KFLAG)
  230 CONTINUE
      IF (N.NE.1) GO TO 240
      S1R = S2R
      S1I = S2I
  240 CONTINUE
      STR = CSRR(KFLAG)
      YR(1) = S1R*STR
      YI(1) = S1I*STR
      IF (N.EQ.1) RETURN
      YR(2) = S2R*STR
      YI(2) = S2I*STR
      IF (N.EQ.2) RETURN
      KK = 2
  250 CONTINUE
      KK = KK + 1
      IF (KK.GT.N) RETURN
      P1R = CSRR(KFLAG)
      ASCLE = BRY(KFLAG)
      DO 260 I=KK,N
        P2R = S2R
        P2I = S2I
        S2R = CKR*P2R - CKI*P2I + S1R
        S2I = CKI*P2R + CKR*P2I + S1I
        S1R = P2R
        S1I = P2I
        CKR = CKR + RZR
        CKI = CKI + RZI
        P2R = S2R*P1R
        P2I = S2I*P1R
        YR(I) = P2R
        YI(I) = P2I
        IF (KFLAG.GE.3) GO TO 260
        STR = DABS(P2R)
        STI = DABS(P2I)
        P2M = DMAX1(STR,STI)
        IF (P2M.LE.ASCLE) GO TO 260
        KFLAG = KFLAG + 1
        ASCLE = BRY(KFLAG)
        S1R = S1R*P1R
        S1I = S1I*P1R
        S2R = P2R
        S2I = P2I
        STR = CSSR(KFLAG)
        S1R = S1R*STR
        S1I = S1I*STR
        S2R = S2R*STR
        S2I = S2I*STR
        P1R = CSRR(KFLAG)
  260 CONTINUE
      RETURN
C-----------------------------------------------------------------------
C     IFLAG=1 CASES, FORWARD RECURRENCE ON SCALED VALUES ON UNDERFLOW
C-----------------------------------------------------------------------
  261 CONTINUE
      HELIM = 0.5D0*ELIM
      ELM = DEXP(-ELIM)
      CELMR = ELM
      ASCLE = BRY(1)
      ZDR = ZR
      ZDI = ZI
      IC = -1
      J = 2
      DO 262 I=1,INU
        STR = S2R
        STI = S2I
        S2R = STR*CKR-STI*CKI+S1R
        S2I = STI*CKR+STR*CKI+S1I
        S1R = STR
        S1I = STI
        CKR = CKR+RZR
        CKI = CKI+RZI
        AS = AZABS(S2R,S2I)
        ALAS = DLOG(AS)
        P2R = -ZDR+ALAS
        IF(P2R.LT.(-ELIM)) GO TO 263
        CALL AZLOG(S2R,S2I,STR,STI,IDUM)
        P2R = -ZDR+STR
        P2I = -ZDI+STI
        P2M = DEXP(P2R)/TOL
        P1R = P2M*DCOS(P2I)
        P1I = P2M*DSIN(P2I)
        CALL ZUCHK(P1R,P1I,NW,ASCLE,TOL)
        IF(NW.NE.0) GO TO 263
        J = 3 - J
        CYR(J) = P1R
        CYI(J) = P1I
        IF(IC.EQ.(I-1)) GO TO 264
        IC = I
        GO TO 262
  263   CONTINUE
        IF(ALAS.LT.HELIM) GO TO 262
        ZDR = ZDR-ELIM
        S1R = S1R*CELMR
        S1I = S1I*CELMR
        S2R = S2R*CELMR
        S2I = S2I*CELMR
  262 CONTINUE
      IF(N.NE.1) GO TO 270
      S1R = S2R
      S1I = S2I
      GO TO 270
  264 CONTINUE
      KFLAG = 1
      INUB = I+1
      S2R = CYR(J)
      S2I = CYI(J)
      J = 3 - J
      S1R = CYR(J)
      S1I = CYI(J)
      IF(INUB.LE.INU) GO TO 225
      IF(N.NE.1) GO TO 240
      S1R = S2R
      S1I = S2I
      GO TO 240
  270 CONTINUE
      YR(1) = S1R
      YI(1) = S1I
      IF(N.EQ.1) GO TO 280
      YR(2) = S2R
      YI(2) = S2I
  280 CONTINUE
      ASCLE = BRY(1)
      CALL ZKSCL(ZDR,ZDI,FNU,N,YR,YI,NZ,RZR,RZI,ASCLE,TOL,ELIM)
      INU = N - NZ
      IF (INU.LE.0) RETURN
      KK = NZ + 1
      S1R = YR(KK)
      S1I = YI(KK)
      YR(KK) = S1R*CSRR(1)
      YI(KK) = S1I*CSRR(1)
      IF (INU.EQ.1) RETURN
      KK = NZ + 2
      S2R = YR(KK)
      S2I = YI(KK)
      YR(KK) = S2R*CSRR(1)
      YI(KK) = S2I*CSRR(1)
      IF (INU.EQ.2) RETURN
      T2 = FNU + DBLE(FLOAT(KK-1))
      CKR = T2*RZR
      CKI = T2*RZI
      KFLAG = 1
      GO TO 250
  290 CONTINUE
C-----------------------------------------------------------------------
C     SCALE BY DEXP(Z), IFLAG = 1 CASES
C-----------------------------------------------------------------------
      KODED = 2
      IFLAG = 1
      KFLAG = 2
      GO TO 120
C-----------------------------------------------------------------------
C     FNU=HALF ODD INTEGER CASE, DNU=-0.5
C-----------------------------------------------------------------------
  300 CONTINUE
      S1R = COEFR
      S1I = COEFI
      S2R = COEFR
      S2I = COEFI
      GO TO 210
C
C
  310 CONTINUE
      NZ=-2
      RETURN
      END
      SUBROUTINE ZBUNI(ZR, ZI, FNU, KODE, N, YR, YI, NZ, NUI, NLAST,
     * FNUL, TOL, ELIM, ALIM)
C***BEGIN PROLOGUE  ZBUNI
C***REFER TO  ZBESI,ZBESK
C
C     ZBUNI COMPUTES THE I BESSEL FUNCTION FOR LARGE CABS(Z).GT.
C     FNUL AND FNU+N-1.LT.FNUL. THE ORDER IS INCREASED FROM
C     FNU+N-1 GREATER THAN FNUL BY ADDING NUI AND COMPUTING
C     ACCORDING TO THE UNIFORM ASYMPTOTIC EXPANSION FOR I(FNU,Z)
C     ON IFORM=1 AND THE EXPANSION FOR J(FNU,Z) ON IFORM=2
C
C***ROUTINES CALLED  ZUNI1,ZUNI2,AZABS,D1MACH
C***END PROLOGUE  ZBUNI
C     COMPLEX CSCL,CSCR,CY,RZ,ST,S1,S2,Y,Z
      DOUBLE PRECISION ALIM, AX, AY, CSCLR, CSCRR, CYI, CYR, DFNU,
     * ELIM, FNU, FNUI, FNUL, GNU, RAZ, RZI, RZR, STI, STR, S1I, S1R,
     * S2I, S2R, TOL, YI, YR, ZI, ZR, AZABS, ASCLE, BRY, C1R, C1I, C1M,
     * D1MACH
      INTEGER I, IFLAG, IFORM, K, KODE, N, NL, NLAST, NUI, NW, NZ
      DIMENSION YR(N), YI(N), CYR(2), CYI(2), BRY(3)
      NZ = 0
      AX = DABS(ZR)*1.7321D0
      AY = DABS(ZI)
      IFORM = 1
      IF (AY.GT.AX) IFORM = 2
      IF (NUI.EQ.0) GO TO 60
      FNUI = DBLE(FLOAT(NUI))
      DFNU = FNU + DBLE(FLOAT(N-1))
      GNU = DFNU + FNUI
      IF (IFORM.EQ.2) GO TO 10
C-----------------------------------------------------------------------
C     ASYMPTOTIC EXPANSION FOR I(FNU,Z) FOR LARGE FNU APPLIED IN
C     -PI/3.LE.ARG(Z).LE.PI/3
C-----------------------------------------------------------------------
      CALL ZUNI1(ZR, ZI, GNU, KODE, 2, CYR, CYI, NW, NLAST, FNUL, TOL,
     * ELIM, ALIM)
      GO TO 20
   10 CONTINUE
C-----------------------------------------------------------------------
C     ASYMPTOTIC EXPANSION FOR J(FNU,Z*EXP(M*HPI)) FOR LARGE FNU
C     APPLIED IN PI/3.LT.ABS(ARG(Z)).LE.PI/2 WHERE M=+I OR -I
C     AND HPI=PI/2
C-----------------------------------------------------------------------
      CALL ZUNI2(ZR, ZI, GNU, KODE, 2, CYR, CYI, NW, NLAST, FNUL, TOL,
     * ELIM, ALIM)
   20 CONTINUE
      IF (NW.LT.0) GO TO 50
      IF (NW.NE.0) GO TO 90
      STR = AZABS(CYR(1),CYI(1))
C----------------------------------------------------------------------
C     SCALE BACKWARD RECURRENCE, BRY(3) IS DEFINED BUT NEVER USED
C----------------------------------------------------------------------
      BRY(1)=1.0D+3*D1MACH(1)/TOL
      BRY(2) = 1.0D0/BRY(1)
      BRY(3) = BRY(2)
      IFLAG = 2
      ASCLE = BRY(2)
      CSCLR = 1.0D0
      IF (STR.GT.BRY(1)) GO TO 21
      IFLAG = 1
      ASCLE = BRY(1)
      CSCLR = 1.0D0/TOL
      GO TO 25
   21 CONTINUE
      IF (STR.LT.BRY(2)) GO TO 25
      IFLAG = 3
      ASCLE=BRY(3)
      CSCLR = TOL
   25 CONTINUE
      CSCRR = 1.0D0/CSCLR
      S1R = CYR(2)*CSCLR
      S1I = CYI(2)*CSCLR
      S2R = CYR(1)*CSCLR
      S2I = CYI(1)*CSCLR
      RAZ = 1.0D0/AZABS(ZR,ZI)
      STR = ZR*RAZ
      STI = -ZI*RAZ
      RZR = (STR+STR)*RAZ
      RZI = (STI+STI)*RAZ
      DO 30 I=1,NUI
        STR = S2R
        STI = S2I
        S2R = (DFNU+FNUI)*(RZR*STR-RZI*STI) + S1R
        S2I = (DFNU+FNUI)*(RZR*STI+RZI*STR) + S1I
        S1R = STR
        S1I = STI
        FNUI = FNUI - 1.0D0
        IF (IFLAG.GE.3) GO TO 30
        STR = S2R*CSCRR
        STI = S2I*CSCRR
        C1R = DABS(STR)
        C1I = DABS(STI)
        C1M = DMAX1(C1R,C1I)
        IF (C1M.LE.ASCLE) GO TO 30
        IFLAG = IFLAG+1
        ASCLE = BRY(IFLAG)
        S1R = S1R*CSCRR
        S1I = S1I*CSCRR
        S2R = STR
        S2I = STI
        CSCLR = CSCLR*TOL
        CSCRR = 1.0D0/CSCLR
        S1R = S1R*CSCLR
        S1I = S1I*CSCLR
        S2R = S2R*CSCLR
        S2I = S2I*CSCLR
   30 CONTINUE
      YR(N) = S2R*CSCRR
      YI(N) = S2I*CSCRR
      IF (N.EQ.1) RETURN
      NL = N - 1
      FNUI = DBLE(FLOAT(NL))
      K = NL
      DO 40 I=1,NL
        STR = S2R
        STI = S2I
        S2R = (FNU+FNUI)*(RZR*STR-RZI*STI) + S1R
        S2I = (FNU+FNUI)*(RZR*STI+RZI*STR) + S1I
        S1R = STR
        S1I = STI
        STR = S2R*CSCRR
        STI = S2I*CSCRR
        YR(K) = STR
        YI(K) = STI
        FNUI = FNUI - 1.0D0
        K = K - 1
        IF (IFLAG.GE.3) GO TO 40
        C1R = DABS(STR)
        C1I = DABS(STI)
        C1M = DMAX1(C1R,C1I)
        IF (C1M.LE.ASCLE) GO TO 40
        IFLAG = IFLAG+1
        ASCLE = BRY(IFLAG)
        S1R = S1R*CSCRR
        S1I = S1I*CSCRR
        S2R = STR
        S2I = STI
        CSCLR = CSCLR*TOL
        CSCRR = 1.0D0/CSCLR
        S1R = S1R*CSCLR
        S1I = S1I*CSCLR
        S2R = S2R*CSCLR
        S2I = S2I*CSCLR
   40 CONTINUE
      RETURN
   50 CONTINUE
      NZ = -1
      IF(NW.EQ.(-2)) NZ=-2
      RETURN
   60 CONTINUE
      IF (IFORM.EQ.2) GO TO 70
C-----------------------------------------------------------------------
C     ASYMPTOTIC EXPANSION FOR I(FNU,Z) FOR LARGE FNU APPLIED IN
C     -PI/3.LE.ARG(Z).LE.PI/3
C-----------------------------------------------------------------------
      CALL ZUNI1(ZR, ZI, FNU, KODE, N, YR, YI, NW, NLAST, FNUL, TOL,
     * ELIM, ALIM)
      GO TO 80
   70 CONTINUE
C-----------------------------------------------------------------------
C     ASYMPTOTIC EXPANSION FOR J(FNU,Z*EXP(M*HPI)) FOR LARGE FNU
C     APPLIED IN PI/3.LT.ABS(ARG(Z)).LE.PI/2 WHERE M=+I OR -I
C     AND HPI=PI/2
C-----------------------------------------------------------------------
      CALL ZUNI2(ZR, ZI, FNU, KODE, N, YR, YI, NW, NLAST, FNUL, TOL,
     * ELIM, ALIM)
   80 CONTINUE
      IF (NW.LT.0) GO TO 50
      NZ = NW
      RETURN
   90 CONTINUE
      NLAST = N
      RETURN
      END
      SUBROUTINE ZDIV(AR, AI, BR, BI, CR, CI)
C***BEGIN PROLOGUE  ZDIV
C***REFER TO  ZBESH,ZBESI,ZBESJ,ZBESK,ZBESY,ZAIRY,ZBIRY
C
C     DOUBLE PRECISION COMPLEX DIVIDE C=A/B.
C
C***ROUTINES CALLED  AZABS
C***END PROLOGUE  ZDIV
      DOUBLE PRECISION AR, AI, BR, BI, CR, CI, BM, CA, CB, CC, CD
      DOUBLE PRECISION AZABS
      BM = 1.0D0/AZABS(BR,BI)
      CC = BR*BM
      CD = BI*BM
      CA = (AR*CC+AI*CD)*BM
      CB = (AI*CC-AR*CD)*BM
      CR = CA
      CI = CB
      RETURN
      END
      SUBROUTINE AZEXP(AR, AI, BR, BI)
C***BEGIN PROLOGUE  AZEXP
C***REFER TO  ZBESH,ZBESI,ZBESJ,ZBESK,ZBESY,ZAIRY,ZBIRY
C
C     DOUBLE PRECISION COMPLEX EXPONENTIAL FUNCTION B=EXP(A)
C
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  AZEXP
      DOUBLE PRECISION AR, AI, BR, BI, ZM, CA, CB
      ZM = DEXP(AR)
      CA = ZM*DCOS(AI)
      CB = ZM*DSIN(AI)
      BR = CA
      BI = CB
      RETURN
      END
      SUBROUTINE ZKSCL(ZRR,ZRI,FNU,N,YR,YI,NZ,RZR,RZI,ASCLE,TOL,ELIM)
C***BEGIN PROLOGUE  ZKSCL
C***REFER TO  ZBESK
C
C     SET K FUNCTIONS TO ZERO ON UNDERFLOW, CONTINUE RECURRENCE
C     ON SCALED FUNCTIONS UNTIL TWO MEMBERS COME ON SCALE, THEN
C     RETURN WITH MIN(NZ+2,N) VALUES SCALED BY 1/TOL.
C
C***ROUTINES CALLED  ZUCHK,AZABS,AZLOG
C***END PROLOGUE  ZKSCL
C     COMPLEX CK,CS,CY,CZERO,RZ,S1,S2,Y,ZR,ZD,CELM
      DOUBLE PRECISION ACS, AS, ASCLE, CKI, CKR, CSI, CSR, CYI,
     * CYR, ELIM, FN, FNU, RZI, RZR, STR, S1I, S1R, S2I,
     * S2R, TOL, YI, YR, ZEROI, ZEROR, ZRI, ZRR, AZABS,
     * ZDR, ZDI, CELMR, ELM, HELIM, ALAS
      INTEGER I, IC, IDUM, KK, N, NN, NW, NZ
      DIMENSION YR(N), YI(N), CYR(2), CYI(2)
      DATA ZEROR,ZEROI / 0.0D0 , 0.0D0 /
C
      NZ = 0
      IC = 0
      NN = MIN0(2,N)
      DO 10 I=1,NN
        S1R = YR(I)
        S1I = YI(I)
        CYR(I) = S1R
        CYI(I) = S1I
        AS = AZABS(S1R,S1I)
        ACS = -ZRR + DLOG(AS)
        NZ = NZ + 1
        YR(I) = ZEROR
        YI(I) = ZEROI
        IF (ACS.LT.(-ELIM)) GO TO 10
        CALL AZLOG(S1R, S1I, CSR, CSI, IDUM)
        CSR = CSR - ZRR
        CSI = CSI - ZRI
        STR = DEXP(CSR)/TOL
        CSR = STR*DCOS(CSI)
        CSI = STR*DSIN(CSI)
        CALL ZUCHK(CSR, CSI, NW, ASCLE, TOL)
        IF (NW.NE.0) GO TO 10
        YR(I) = CSR
        YI(I) = CSI
        IC = I
        NZ = NZ - 1
   10 CONTINUE
      IF (N.EQ.1) RETURN
      IF (IC.GT.1) GO TO 20
      YR(1) = ZEROR
      YI(1) = ZEROI
      NZ = 2
   20 CONTINUE
      IF (N.EQ.2) RETURN
      IF (NZ.EQ.0) RETURN
      FN = FNU + 1.0D0
      CKR = FN*RZR
      CKI = FN*RZI
      S1R = CYR(1)
      S1I = CYI(1)
      S2R = CYR(2)
      S2I = CYI(2)
      HELIM = 0.5D0*ELIM
      ELM = DEXP(-ELIM)
      CELMR = ELM
      ZDR = ZRR
      ZDI = ZRI
C
C     FIND TWO CONSECUTIVE Y VALUES ON SCALE. SCALE RECURRENCE IF
C     S2 GETS LARGER THAN EXP(ELIM/2)
C
      DO 30 I=3,N
        KK = I
        CSR = S2R
        CSI = S2I
        S2R = CKR*CSR - CKI*CSI + S1R
        S2I = CKI*CSR + CKR*CSI + S1I
        S1R = CSR
        S1I = CSI
        CKR = CKR + RZR
        CKI = CKI + RZI
        AS = AZABS(S2R,S2I)
        ALAS = DLOG(AS)
        ACS = -ZDR + ALAS
        NZ = NZ + 1
        YR(I) = ZEROR
        YI(I) = ZEROI
        IF (ACS.LT.(-ELIM)) GO TO 25
        CALL AZLOG(S2R, S2I, CSR, CSI, IDUM)
        CSR = CSR - ZDR
        CSI = CSI - ZDI
        STR = DEXP(CSR)/TOL
        CSR = STR*DCOS(CSI)
        CSI = STR*DSIN(CSI)
        CALL ZUCHK(CSR, CSI, NW, ASCLE, TOL)
        IF (NW.NE.0) GO TO 25
        YR(I) = CSR
        YI(I) = CSI
        NZ = NZ - 1
        IF (IC.EQ.KK-1) GO TO 40
        IC = KK
        GO TO 30
   25   CONTINUE
        IF(ALAS.LT.HELIM) GO TO 30
        ZDR = ZDR - ELIM
        S1R = S1R*CELMR
        S1I = S1I*CELMR
        S2R = S2R*CELMR
        S2I = S2I*CELMR
   30 CONTINUE
      NZ = N
      IF(IC.EQ.N) NZ=N-1
      GO TO 45
   40 CONTINUE
      NZ = KK - 2
   45 CONTINUE
      DO 50 I=1,NZ
        YR(I) = ZEROR
        YI(I) = ZEROI
   50 CONTINUE
      RETURN
      END
      SUBROUTINE AZLOG(AR, AI, BR, BI, IERR)
C***BEGIN PROLOGUE  AZLOG
C***REFER TO  ZBESH,ZBESI,ZBESJ,ZBESK,ZBESY,ZAIRY,ZBIRY
C
C     DOUBLE PRECISION COMPLEX LOGARITHM B=CLOG(A)
C     IERR=0,NORMAL RETURN      IERR=1, Z=CMPLX(0.0,0.0)
C***ROUTINES CALLED  AZABS
C***END PROLOGUE  AZLOG
      DOUBLE PRECISION AR, AI, BR, BI, ZM, DTHETA, DPI, DHPI
      DOUBLE PRECISION AZABS
      DATA DPI , DHPI  / 3.141592653589793238462643383D+0,
     1                   1.570796326794896619231321696D+0/
C
      IERR=0
      IF (AR.EQ.0.0D+0) GO TO 10
      IF (AI.EQ.0.0D+0) GO TO 20
      DTHETA = DATAN(AI/AR)
      IF (DTHETA.LE.0.0D+0) GO TO 40
      IF (AR.LT.0.0D+0) DTHETA = DTHETA - DPI
      GO TO 50
   10 IF (AI.EQ.0.0D+0) GO TO 60
      BI = DHPI
      BR = DLOG(DABS(AI))
      IF (AI.LT.0.0D+0) BI = -BI
      RETURN
   20 IF (AR.GT.0.0D+0) GO TO 30
      BR = DLOG(DABS(AR))
      BI = DPI
      RETURN
   30 BR = DLOG(AR)
      BI = 0.0D+0
      RETURN
   40 IF (AR.LT.0.0D+0) DTHETA = DTHETA + DPI
   50 ZM = AZABS(AR,AI)
      BR = DLOG(ZM)
      BI = DTHETA
      RETURN
   60 CONTINUE
      IERR=1
      RETURN
      END
      SUBROUTINE ZMLRI(ZR, ZI, FNU, KODE, N, YR, YI, NZ, TOL)
C***BEGIN PROLOGUE  ZMLRI
C***REFER TO  ZBESI,ZBESK
C
C     ZMLRI COMPUTES THE I BESSEL FUNCTION FOR RE(Z).GE.0.0 BY THE
C     MILLER ALGORITHM NORMALIZED BY A NEUMANN SERIES.
C
C***ROUTINES CALLED  DGAMLN,D1MACH,AZABS,AZEXP,AZLOG,ZMLT
C***END PROLOGUE  ZMLRI
C     COMPLEX CK,CNORM,CONE,CTWO,CZERO,PT,P1,P2,RZ,SUM,Y,Z
      DOUBLE PRECISION ACK, AK, AP, AT, AZ, BK, CKI, CKR, CNORMI,
     * CNORMR, CONEI, CONER, FKAP, FKK, FLAM, FNF, FNU, PTI, PTR, P1I,
     * P1R, P2I, P2R, RAZ, RHO, RHO2, RZI, RZR, SCLE, STI, STR, SUMI,
     * SUMR, TFNF, TOL, TST, YI, YR, ZEROI, ZEROR, ZI, ZR, DGAMLN,
     * D1MACH, AZABS
      INTEGER I, IAZ, IDUM, IFNU, INU, ITIME, K, KK, KM, KODE, M, N, NZ
      DIMENSION YR(N), YI(N)
      DATA ZEROR,ZEROI,CONER,CONEI / 0.0D0, 0.0D0, 1.0D0, 0.0D0 /
      SCLE = D1MACH(1)/TOL
      NZ=0
      AZ = AZABS(ZR,ZI)
      IAZ = INT(SNGL(AZ))
      IFNU = INT(SNGL(FNU))
      INU = IFNU + N - 1
      AT = DBLE(FLOAT(IAZ)) + 1.0D0
      RAZ = 1.0D0/AZ
      STR = ZR*RAZ
      STI = -ZI*RAZ
      CKR = STR*AT*RAZ
      CKI = STI*AT*RAZ
      RZR = (STR+STR)*RAZ
      RZI = (STI+STI)*RAZ
      P1R = ZEROR
      P1I = ZEROI
      P2R = CONER
      P2I = CONEI
      ACK = (AT+1.0D0)*RAZ
      RHO = ACK + DSQRT(ACK*ACK-1.0D0)
      RHO2 = RHO*RHO
      TST = (RHO2+RHO2)/((RHO2-1.0D0)*(RHO-1.0D0))
      TST = TST/TOL
C-----------------------------------------------------------------------
C     COMPUTE RELATIVE TRUNCATION ERROR INDEX FOR SERIES
C-----------------------------------------------------------------------
      AK = AT
      DO 10 I=1,80
        PTR = P2R
        PTI = P2I
        P2R = P1R - (CKR*PTR-CKI*PTI)
        P2I = P1I - (CKI*PTR+CKR*PTI)
        P1R = PTR
        P1I = PTI
        CKR = CKR + RZR
        CKI = CKI + RZI
        AP = AZABS(P2R,P2I)
        IF (AP.GT.TST*AK*AK) GO TO 20
        AK = AK + 1.0D0
   10 CONTINUE
      GO TO 110
   20 CONTINUE
      I = I + 1
      K = 0
      IF (INU.LT.IAZ) GO TO 40
C-----------------------------------------------------------------------
C     COMPUTE RELATIVE TRUNCATION ERROR FOR RATIOS
C-----------------------------------------------------------------------
      P1R = ZEROR
      P1I = ZEROI
      P2R = CONER
      P2I = CONEI
      AT = DBLE(FLOAT(INU)) + 1.0D0
      STR = ZR*RAZ
      STI = -ZI*RAZ
      CKR = STR*AT*RAZ
      CKI = STI*AT*RAZ
      ACK = AT*RAZ
      TST = DSQRT(ACK/TOL)
      ITIME = 1
      DO 30 K=1,80
        PTR = P2R
        PTI = P2I
        P2R = P1R - (CKR*PTR-CKI*PTI)
        P2I = P1I - (CKR*PTI+CKI*PTR)
        P1R = PTR
        P1I = PTI
        CKR = CKR + RZR
        CKI = CKI + RZI
        AP = AZABS(P2R,P2I)
        IF (AP.LT.TST) GO TO 30
        IF (ITIME.EQ.2) GO TO 40
        ACK = AZABS(CKR,CKI)
        FLAM = ACK + DSQRT(ACK*ACK-1.0D0)
        FKAP = AP/AZABS(P1R,P1I)
        RHO = DMIN1(FLAM,FKAP)
        TST = TST*DSQRT(RHO/(RHO*RHO-1.0D0))
        ITIME = 2
   30 CONTINUE
      GO TO 110
   40 CONTINUE
C-----------------------------------------------------------------------
C     BACKWARD RECURRENCE AND SUM NORMALIZING RELATION
C-----------------------------------------------------------------------
      K = K + 1
      KK = MAX0(I+IAZ,K+INU)
      FKK = DBLE(FLOAT(KK))
      P1R = ZEROR
      P1I = ZEROI
C-----------------------------------------------------------------------
C     SCALE P2 AND SUM BY SCLE
C-----------------------------------------------------------------------
      P2R = SCLE
      P2I = ZEROI
      FNF = FNU - DBLE(FLOAT(IFNU))
      TFNF = FNF + FNF
      BK = DGAMLN(FKK+TFNF+1.0D0,IDUM) - DGAMLN(FKK+1.0D0,IDUM) -
     * DGAMLN(TFNF+1.0D0,IDUM)
      BK = DEXP(BK)
      SUMR = ZEROR
      SUMI = ZEROI
      KM = KK - INU
      DO 50 I=1,KM
        PTR = P2R
        PTI = P2I
        P2R = P1R + (FKK+FNF)*(RZR*PTR-RZI*PTI)
        P2I = P1I + (FKK+FNF)*(RZI*PTR+RZR*PTI)
        P1R = PTR
        P1I = PTI
        AK = 1.0D0 - TFNF/(FKK+TFNF)
        ACK = BK*AK
        SUMR = SUMR + (ACK+BK)*P1R
        SUMI = SUMI + (ACK+BK)*P1I
        BK = ACK
        FKK = FKK - 1.0D0
   50 CONTINUE
      YR(N) = P2R
      YI(N) = P2I
      IF (N.EQ.1) GO TO 70
      DO 60 I=2,N
        PTR = P2R
        PTI = P2I
        P2R = P1R + (FKK+FNF)*(RZR*PTR-RZI*PTI)
        P2I = P1I + (FKK+FNF)*(RZI*PTR+RZR*PTI)
        P1R = PTR
        P1I = PTI
        AK = 1.0D0 - TFNF/(FKK+TFNF)
        ACK = BK*AK
        SUMR = SUMR + (ACK+BK)*P1R
        SUMI = SUMI + (ACK+BK)*P1I
        BK = ACK
        FKK = FKK - 1.0D0
        M = N - I + 1
        YR(M) = P2R
        YI(M) = P2I
   60 CONTINUE
   70 CONTINUE
      IF (IFNU.LE.0) GO TO 90
      DO 80 I=1,IFNU
        PTR = P2R
        PTI = P2I
        P2R = P1R + (FKK+FNF)*(RZR*PTR-RZI*PTI)
        P2I = P1I + (FKK+FNF)*(RZR*PTI+RZI*PTR)
        P1R = PTR
        P1I = PTI
        AK = 1.0D0 - TFNF/(FKK+TFNF)
        ACK = BK*AK
        SUMR = SUMR + (ACK+BK)*P1R
        SUMI = SUMI + (ACK+BK)*P1I
        BK = ACK
        FKK = FKK - 1.0D0
   80 CONTINUE
   90 CONTINUE
      PTR = ZR
      PTI = ZI
      IF (KODE.EQ.2) PTR = ZEROR
      CALL AZLOG(RZR, RZI, STR, STI, IDUM)
      P1R = -FNF*STR + PTR
      P1I = -FNF*STI + PTI
      AP = DGAMLN(1.0D0+FNF,IDUM)
      PTR = P1R - AP
      PTI = P1I
C-----------------------------------------------------------------------
C     THE DIVISION CEXP(PT)/(SUM+P2) IS ALTERED TO AVOID OVERFLOW
C     IN THE DENOMINATOR BY SQUARING LARGE QUANTITIES
C-----------------------------------------------------------------------
      P2R = P2R + SUMR
      P2I = P2I + SUMI
      AP = AZABS(P2R,P2I)
      P1R = 1.0D0/AP
      CALL AZEXP(PTR, PTI, STR, STI)
      CKR = STR*P1R
      CKI = STI*P1R
      PTR = P2R*P1R
      PTI = -P2I*P1R
      CALL ZMLT(CKR, CKI, PTR, PTI, CNORMR, CNORMI)
      DO 100 I=1,N
        STR = YR(I)*CNORMR - YI(I)*CNORMI
        YI(I) = YR(I)*CNORMI + YI(I)*CNORMR
        YR(I) = STR
  100 CONTINUE
      RETURN
  110 CONTINUE
      NZ=-2
      RETURN
      END
      SUBROUTINE ZMLT(AR, AI, BR, BI, CR, CI)
C***BEGIN PROLOGUE  ZMLT
C***REFER TO  ZBESH,ZBESI,ZBESJ,ZBESK,ZBESY,ZAIRY,ZBIRY
C
C     DOUBLE PRECISION COMPLEX MULTIPLY, C=A*B.
C
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  ZMLT
      DOUBLE PRECISION AR, AI, BR, BI, CR, CI, CA, CB
      CA = AR*BR - AI*BI
      CB = AR*BI + AI*BR
      CR = CA
      CI = CB
      RETURN
      END
      SUBROUTINE ZRATI(ZR, ZI, FNU, N, CYR, CYI, TOL)
C***BEGIN PROLOGUE  ZRATI
C***REFER TO  ZBESI,ZBESK,ZBESH
C
C     ZRATI COMPUTES RATIOS OF I BESSEL FUNCTIONS BY BACKWARD
C     RECURRENCE.  THE STARTING INDEX IS DETERMINED BY FORWARD
C     RECURRENCE AS DESCRIBED IN J. RES. OF NAT. BUR. OF STANDARDS-B,
C     MATHEMATICAL SCIENCES, VOL 77B, P111-114, SEPTEMBER, 1973,
C     BESSEL FUNCTIONS I AND J OF COMPLEX ARGUMENT AND INTEGER ORDER,
C     BY D. J. SOOKNE.
C
C***ROUTINES CALLED  AZABS,ZDIV
C***END PROLOGUE  ZRATI
C     COMPLEX Z,CY(1),CONE,CZERO,P1,P2,T1,RZ,PT,CDFNU
      DOUBLE PRECISION AK, AMAGZ, AP1, AP2, ARG, AZ, CDFNUI, CDFNUR,
     * CONEI, CONER, CYI, CYR, CZEROI, CZEROR, DFNU, FDNU, FLAM, FNU,
     * FNUP, PTI, PTR, P1I, P1R, P2I, P2R, RAK, RAP1, RHO, RT2, RZI,
     * RZR, TEST, TEST1, TOL, TTI, TTR, T1I, T1R, ZI, ZR, AZABS
      INTEGER I, ID, IDNU, INU, ITIME, K, KK, MAGZ, N
      DIMENSION CYR(N), CYI(N)
      DATA CZEROR,CZEROI,CONER,CONEI,RT2/
     1 0.0D0, 0.0D0, 1.0D0, 0.0D0, 1.41421356237309505D0 /
      AZ = AZABS(ZR,ZI)
      INU = INT(SNGL(FNU))
      IDNU = INU + N - 1
      MAGZ = INT(SNGL(AZ))
      AMAGZ = DBLE(FLOAT(MAGZ+1))
      FDNU = DBLE(FLOAT(IDNU))
      FNUP = DMAX1(AMAGZ,FDNU)
      ID = IDNU - MAGZ - 1
      ITIME = 1
      K = 1
      PTR = 1.0D0/AZ
      RZR = PTR*(ZR+ZR)*PTR
      RZI = -PTR*(ZI+ZI)*PTR
      T1R = RZR*FNUP
      T1I = RZI*FNUP
      P2R = -T1R
      P2I = -T1I
      P1R = CONER
      P1I = CONEI
      T1R = T1R + RZR
      T1I = T1I + RZI
      IF (ID.GT.0) ID = 0
      AP2 = AZABS(P2R,P2I)
      AP1 = AZABS(P1R,P1I)
C-----------------------------------------------------------------------
C     THE OVERFLOW TEST ON K(FNU+I-1,Z) BEFORE THE CALL TO CBKNU
C     GUARANTEES THAT P2 IS ON SCALE. SCALE TEST1 AND ALL SUBSEQUENT
C     P2 VALUES BY AP1 TO ENSURE THAT AN OVERFLOW DOES NOT OCCUR
C     PREMATURELY.
C-----------------------------------------------------------------------
      ARG = (AP2+AP2)/(AP1*TOL)
      TEST1 = DSQRT(ARG)
      TEST = TEST1
      RAP1 = 1.0D0/AP1
      P1R = P1R*RAP1
      P1I = P1I*RAP1
      P2R = P2R*RAP1
      P2I = P2I*RAP1
      AP2 = AP2*RAP1
   10 CONTINUE
      K = K + 1
      AP1 = AP2
      PTR = P2R
      PTI = P2I
      P2R = P1R - (T1R*PTR-T1I*PTI)
      P2I = P1I - (T1R*PTI+T1I*PTR)
      P1R = PTR
      P1I = PTI
      T1R = T1R + RZR
      T1I = T1I + RZI
      AP2 = AZABS(P2R,P2I)
      IF (AP1.LE.TEST) GO TO 10
      IF (ITIME.EQ.2) GO TO 20
      AK = AZABS(T1R,T1I)*0.5D0
      FLAM = AK + DSQRT(AK*AK-1.0D0)
      RHO = DMIN1(AP2/AP1,FLAM)
      TEST = TEST1*DSQRT(RHO/(RHO*RHO-1.0D0))
      ITIME = 2
      GO TO 10
   20 CONTINUE
      KK = K + 1 - ID
      AK = DBLE(FLOAT(KK))
      T1R = AK
      T1I = CZEROI
      DFNU = FNU + DBLE(FLOAT(N-1))
      P1R = 1.0D0/AP2
      P1I = CZEROI
      P2R = CZEROR
      P2I = CZEROI
      DO 30 I=1,KK
        PTR = P1R
        PTI = P1I
        RAP1 = DFNU + T1R
        TTR = RZR*RAP1
        TTI = RZI*RAP1
        P1R = (PTR*TTR-PTI*TTI) + P2R
        P1I = (PTR*TTI+PTI*TTR) + P2I
        P2R = PTR
        P2I = PTI
        T1R = T1R - CONER
   30 CONTINUE
      IF (P1R.NE.CZEROR .OR. P1I.NE.CZEROI) GO TO 40
      P1R = TOL
      P1I = TOL
   40 CONTINUE
      CALL ZDIV(P2R, P2I, P1R, P1I, CYR(N), CYI(N))
      IF (N.EQ.1) RETURN
      K = N - 1
      AK = DBLE(FLOAT(K))
      T1R = AK
      T1I = CZEROI
      CDFNUR = FNU*RZR
      CDFNUI = FNU*RZI
      DO 60 I=2,N
        PTR = CDFNUR + (T1R*RZR-T1I*RZI) + CYR(K+1)
        PTI = CDFNUI + (T1R*RZI+T1I*RZR) + CYI(K+1)
        AK = AZABS(PTR,PTI)
        IF (AK.NE.CZEROR) GO TO 50
        PTR = TOL
        PTI = TOL
        AK = TOL*RT2
   50   CONTINUE
        RAK = CONER/AK
        CYR(K) = RAK*PTR*RAK
        CYI(K) = -RAK*PTI*RAK
        T1R = T1R - CONER
        K = K - 1
   60 CONTINUE
      RETURN
      END
      SUBROUTINE ZS1S2(ZRR, ZRI, S1R, S1I, S2R, S2I, NZ, ASCLE, ALIM,
     * IUF)
C***BEGIN PROLOGUE  ZS1S2
C***REFER TO  ZBESK,ZAIRY
C
C     ZS1S2 TESTS FOR A POSSIBLE UNDERFLOW RESULTING FROM THE
C     ADDITION OF THE I AND K FUNCTIONS IN THE ANALYTIC CON-
C     TINUATION FORMULA WHERE S1=K FUNCTION AND S2=I FUNCTION.
C     ON KODE=1 THE I AND K FUNCTIONS ARE DIFFERENT ORDERS OF
C     MAGNITUDE, BUT FOR KODE=2 THEY CAN BE OF THE SAME ORDER
C     OF MAGNITUDE AND THE MAXIMUM MUST BE AT LEAST ONE
C     PRECISION ABOVE THE UNDERFLOW LIMIT.
C
C***ROUTINES CALLED  AZABS,AZEXP,AZLOG
C***END PROLOGUE  ZS1S2
C     COMPLEX CZERO,C1,S1,S1D,S2,ZR
      DOUBLE PRECISION AA, ALIM, ALN, ASCLE, AS1, AS2, C1I, C1R, S1DI,
     * S1DR, S1I, S1R, S2I, S2R, ZEROI, ZEROR, ZRI, ZRR, AZABS
      INTEGER IUF, IDUM, NZ
      DATA ZEROR,ZEROI  / 0.0D0 , 0.0D0 /
      NZ = 0
      AS1 = AZABS(S1R,S1I)
      AS2 = AZABS(S2R,S2I)
      IF (S1R.EQ.0.0D0 .AND. S1I.EQ.0.0D0) GO TO 10
      IF (AS1.EQ.0.0D0) GO TO 10
      ALN = -ZRR - ZRR + DLOG(AS1)
      S1DR = S1R
      S1DI = S1I
      S1R = ZEROR
      S1I = ZEROI
      AS1 = ZEROR
      IF (ALN.LT.(-ALIM)) GO TO 10
      CALL AZLOG(S1DR, S1DI, C1R, C1I, IDUM)
      C1R = C1R - ZRR - ZRR
      C1I = C1I - ZRI - ZRI
      CALL AZEXP(C1R, C1I, S1R, S1I)
      AS1 = AZABS(S1R,S1I)
      IUF = IUF + 1
   10 CONTINUE
      AA = DMAX1(AS1,AS2)
      IF (AA.GT.ASCLE) RETURN
      S1R = ZEROR
      S1I = ZEROI
      S2R = ZEROR
      S2I = ZEROI
      NZ = 1
      IUF = 0
      RETURN
      END
      SUBROUTINE ZSERI(ZR, ZI, FNU, KODE, N, YR, YI, NZ, TOL, ELIM,
     * ALIM)
C***BEGIN PROLOGUE  ZSERI
C***REFER TO  ZBESI,ZBESK
C
C     ZSERI COMPUTES THE I BESSEL FUNCTION FOR REAL(Z).GE.0.0 BY
C     MEANS OF THE POWER SERIES FOR LARGE CABS(Z) IN THE
C     REGION CABS(Z).LE.2*SQRT(FNU+1). NZ=0 IS A NORMAL RETURN.
C     NZ.GT.0 MEANS THAT THE LAST NZ COMPONENTS WERE SET TO ZERO
C     DUE TO UNDERFLOW. NZ.LT.0 MEANS UNDERFLOW OCCURRED, BUT THE
C     CONDITION CABS(Z).LE.2*SQRT(FNU+1) WAS VIOLATED AND THE
C     COMPUTATION MUST BE COMPLETED IN ANOTHER ROUTINE WITH N=N-ABS(NZ).
C
C***ROUTINES CALLED  DGAMLN,D1MACH,ZUCHK,AZABS,ZDIV,AZLOG,ZMLT
C***END PROLOGUE  ZSERI
C     COMPLEX AK1,CK,COEF,CONE,CRSC,CSCL,CZ,CZERO,HZ,RZ,S1,S2,Y,Z
      DOUBLE PRECISION AA, ACZ, AK, AK1I, AK1R, ALIM, ARM, ASCLE, ATOL,
     * AZ, CKI, CKR, COEFI, COEFR, CONEI, CONER, CRSCR, CZI, CZR, DFNU,
     * ELIM, FNU, FNUP, HZI, HZR, RAZ, RS, RTR1, RZI, RZR, S, SS, STI,
     * STR, S1I, S1R, S2I, S2R, TOL, YI, YR, WI, WR, ZEROI, ZEROR, ZI,
     * ZR, DGAMLN, D1MACH, AZABS
      INTEGER I, IB, IDUM, IFLAG, IL, K, KODE, L, M, N, NN, NZ, NW
      DIMENSION YR(N), YI(N), WR(2), WI(2)
      DATA ZEROR,ZEROI,CONER,CONEI / 0.0D0, 0.0D0, 1.0D0, 0.0D0 /
C
      NZ = 0
      AZ = AZABS(ZR,ZI)
      IF (AZ.EQ.0.0D0) GO TO 160
      ARM = 1.0D+3*D1MACH(1)
      RTR1 = DSQRT(ARM)
      CRSCR = 1.0D0
      IFLAG = 0
      IF (AZ.LT.ARM) GO TO 150
      HZR = 0.5D0*ZR
      HZI = 0.5D0*ZI
      CZR = ZEROR
      CZI = ZEROI
      IF (AZ.LE.RTR1) GO TO 10
      CALL ZMLT(HZR, HZI, HZR, HZI, CZR, CZI)
   10 CONTINUE
      ACZ = AZABS(CZR,CZI)
      NN = N
      CALL AZLOG(HZR, HZI, CKR, CKI, IDUM)
   20 CONTINUE
      DFNU = FNU + DBLE(FLOAT(NN-1))
      FNUP = DFNU + 1.0D0
C-----------------------------------------------------------------------
C     UNDERFLOW TEST
C-----------------------------------------------------------------------
      AK1R = CKR*DFNU
      AK1I = CKI*DFNU
      AK = DGAMLN(FNUP,IDUM)
      AK1R = AK1R - AK
      IF (KODE.EQ.2) AK1R = AK1R - ZR
      IF (AK1R.GT.(-ELIM)) GO TO 40
   30 CONTINUE
      NZ = NZ + 1
      YR(NN) = ZEROR
      YI(NN) = ZEROI
      IF (ACZ.GT.DFNU) GO TO 190
      NN = NN - 1
      IF (NN.EQ.0) RETURN
      GO TO 20
   40 CONTINUE
      IF (AK1R.GT.(-ALIM)) GO TO 50
      IFLAG = 1
      SS = 1.0D0/TOL
      CRSCR = TOL
      ASCLE = ARM*SS
   50 CONTINUE
      AA = DEXP(AK1R)
      IF (IFLAG.EQ.1) AA = AA*SS
      COEFR = AA*DCOS(AK1I)
      COEFI = AA*DSIN(AK1I)
      ATOL = TOL*ACZ/FNUP
      IL = MIN0(2,NN)
      DO 90 I=1,IL
        DFNU = FNU + DBLE(FLOAT(NN-I))
        FNUP = DFNU + 1.0D0
        S1R = CONER
        S1I = CONEI
        IF (ACZ.LT.TOL*FNUP) GO TO 70
        AK1R = CONER
        AK1I = CONEI
        AK = FNUP + 2.0D0
        S = FNUP
        AA = 2.0D0
   60   CONTINUE
        RS = 1.0D0/S
        STR = AK1R*CZR - AK1I*CZI
        STI = AK1R*CZI + AK1I*CZR
        AK1R = STR*RS
        AK1I = STI*RS
        S1R = S1R + AK1R
        S1I = S1I + AK1I
        S = S + AK
        AK = AK + 2.0D0
        AA = AA*ACZ*RS
        IF (AA.GT.ATOL) GO TO 60
   70   CONTINUE
        S2R = S1R*COEFR - S1I*COEFI
        S2I = S1R*COEFI + S1I*COEFR
        WR(I) = S2R
        WI(I) = S2I
        IF (IFLAG.EQ.0) GO TO 80
        CALL ZUCHK(S2R, S2I, NW, ASCLE, TOL)
        IF (NW.NE.0) GO TO 30
   80   CONTINUE
        M = NN - I + 1
        YR(M) = S2R*CRSCR
        YI(M) = S2I*CRSCR
        IF (I.EQ.IL) GO TO 90
        CALL ZDIV(COEFR, COEFI, HZR, HZI, STR, STI)
        COEFR = STR*DFNU
        COEFI = STI*DFNU
   90 CONTINUE
      IF (NN.LE.2) RETURN
      K = NN - 2
      AK = DBLE(FLOAT(K))
      RAZ = 1.0D0/AZ
      STR = ZR*RAZ
      STI = -ZI*RAZ
      RZR = (STR+STR)*RAZ
      RZI = (STI+STI)*RAZ
      IF (IFLAG.EQ.1) GO TO 120
      IB = 3
  100 CONTINUE
      DO 110 I=IB,NN
        YR(K) = (AK+FNU)*(RZR*YR(K+1)-RZI*YI(K+1)) + YR(K+2)
        YI(K) = (AK+FNU)*(RZR*YI(K+1)+RZI*YR(K+1)) + YI(K+2)
        AK = AK - 1.0D0
        K = K - 1
  110 CONTINUE
      RETURN
C-----------------------------------------------------------------------
C     RECUR BACKWARD WITH SCALED VALUES
C-----------------------------------------------------------------------
  120 CONTINUE
C-----------------------------------------------------------------------
C     EXP(-ALIM)=EXP(-ELIM)/TOL=APPROX. ONE PRECISION ABOVE THE
C     UNDERFLOW LIMIT = ASCLE = D1MACH(1)*SS*1.0D+3
C-----------------------------------------------------------------------
      S1R = WR(1)
      S1I = WI(1)
      S2R = WR(2)
      S2I = WI(2)
      DO 130 L=3,NN
        CKR = S2R
        CKI = S2I
        S2R = S1R + (AK+FNU)*(RZR*CKR-RZI*CKI)
        S2I = S1I + (AK+FNU)*(RZR*CKI+RZI*CKR)
        S1R = CKR
        S1I = CKI
        CKR = S2R*CRSCR
        CKI = S2I*CRSCR
        YR(K) = CKR
        YI(K) = CKI
        AK = AK - 1.0D0
        K = K - 1
        IF (AZABS(CKR,CKI).GT.ASCLE) GO TO 140
  130 CONTINUE
      RETURN
  140 CONTINUE
      IB = L + 1
      IF (IB.GT.NN) RETURN
      GO TO 100
  150 CONTINUE
      NZ = N
      IF (FNU.EQ.0.0D0) NZ = NZ - 1
  160 CONTINUE
      YR(1) = ZEROR
      YI(1) = ZEROI
      IF (FNU.NE.0.0D0) GO TO 170
      YR(1) = CONER
      YI(1) = CONEI
  170 CONTINUE
      IF (N.EQ.1) RETURN
      DO 180 I=2,N
        YR(I) = ZEROR
        YI(I) = ZEROI
  180 CONTINUE
      RETURN
C-----------------------------------------------------------------------
C     RETURN WITH NZ.LT.0 IF CABS(Z*Z/4).GT.FNU+N-NZ-1 COMPLETE
C     THE CALCULATION IN CBINU WITH N=N-IABS(NZ)
C-----------------------------------------------------------------------
  190 CONTINUE
      NZ = -NZ
      RETURN
      END
      SUBROUTINE ZSHCH(ZR, ZI, CSHR, CSHI, CCHR, CCHI)
C***BEGIN PROLOGUE  ZSHCH
C***REFER TO  ZBESK,ZBESH
C
C     ZSHCH COMPUTES THE COMPLEX HYPERBOLIC FUNCTIONS CSH=SINH(X+I*Y)
C     AND CCH=COSH(X+I*Y), WHERE I**2=-1.
C
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  ZSHCH
C
      DOUBLE PRECISION CCHI, CCHR, CH, CN, CSHI, CSHR, SH, SN, ZI, ZR,
     * DCOSH, DSINH
      SH = DSINH(ZR)
      CH = DCOSH(ZR)
      SN = DSIN(ZI)
      CN = DCOS(ZI)
      CSHR = SH*CN
      CSHI = CH*SN
      CCHR = CH*CN
      CCHI = SH*SN
      RETURN
      END
      SUBROUTINE AZSQRT(AR, AI, BR, BI)
C***BEGIN PROLOGUE  AZSQRT
C***REFER TO  ZBESH,ZBESI,ZBESJ,ZBESK,ZBESY,ZAIRY,ZBIRY
C
C     DOUBLE PRECISION COMPLEX SQUARE ROOT, B=CSQRT(A)
C
C***ROUTINES CALLED  AZABS
C***END PROLOGUE  AZSQRT
      DOUBLE PRECISION AR, AI, BR, BI, ZM, DTHETA, DPI, DRT
      DOUBLE PRECISION AZABS
      DATA DRT , DPI / 7.071067811865475244008443621D-1,
     1                 3.141592653589793238462643383D+0/
      ZM = AZABS(AR,AI)
      ZM = DSQRT(ZM)
      IF (AR.EQ.0.0D+0) GO TO 10
      IF (AI.EQ.0.0D+0) GO TO 20
      DTHETA = DATAN(AI/AR)
      IF (DTHETA.LE.0.0D+0) GO TO 40
      IF (AR.LT.0.0D+0) DTHETA = DTHETA - DPI
      GO TO 50
   10 IF (AI.GT.0.0D+0) GO TO 60
      IF (AI.LT.0.0D+0) GO TO 70
      BR = 0.0D+0
      BI = 0.0D+0
      RETURN
   20 IF (AR.GT.0.0D+0) GO TO 30
      BR = 0.0D+0
      BI = DSQRT(DABS(AR))
      RETURN
   30 BR = DSQRT(AR)
      BI = 0.0D+0
      RETURN
   40 IF (AR.LT.0.0D+0) DTHETA = DTHETA + DPI
   50 DTHETA = DTHETA*0.5D+0
      BR = ZM*DCOS(DTHETA)
      BI = ZM*DSIN(DTHETA)
      RETURN
   60 BR = ZM*DRT
      BI = ZM*DRT
      RETURN
   70 BR = ZM*DRT
      BI = -ZM*DRT
      RETURN
      END
      SUBROUTINE ZUCHK(YR, YI, NZ, ASCLE, TOL)
C***BEGIN PROLOGUE  ZUCHK
C***REFER TO ZSERI,ZUOIK,ZUNK1,ZUNK2,ZUNI1,ZUNI2,ZKSCL
C
C      Y ENTERS AS A SCALED QUANTITY WHOSE MAGNITUDE IS GREATER THAN
C      EXP(-ALIM)=ASCLE=1.0E+3*D1MACH(1)/TOL. THE TEST IS MADE TO SEE
C      IF THE MAGNITUDE OF THE REAL OR IMAGINARY PART WOULD UNDERFLOW
C      WHEN Y IS SCALED (BY TOL) TO ITS PROPER VALUE. Y IS ACCEPTED
C      IF THE UNDERFLOW IS AT LEAST ONE PRECISION BELOW THE MAGNITUDE
C      OF THE LARGEST COMPONENT; OTHERWISE THE PHASE ANGLE DOES NOT HAVE
C      ABSOLUTE ACCURACY AND AN UNDERFLOW IS ASSUMED.
C
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  ZUCHK
C
C     COMPLEX Y
      DOUBLE PRECISION ASCLE, SS, ST, TOL, WR, WI, YR, YI
      INTEGER NZ
      NZ = 0
      WR = DABS(YR)
      WI = DABS(YI)
      ST = DMIN1(WR,WI)
      IF (ST.GT.ASCLE) RETURN
      SS = DMAX1(WR,WI)
      ST = ST/TOL
      IF (SS.LT.ST) NZ = 1
      RETURN
      END
      SUBROUTINE ZUNHJ(ZR, ZI, FNU, IPMTR, TOL, PHIR, PHII, ARGR, ARGI,
     * ZETA1R, ZETA1I, ZETA2R, ZETA2I, ASUMR, ASUMI, BSUMR, BSUMI)
C***BEGIN PROLOGUE  ZUNHJ
C***REFER TO  ZBESI,ZBESK
C
C     REFERENCES
C         HANDBOOK OF MATHEMATICAL FUNCTIONS BY M. ABRAMOWITZ AND I.A.
C         STEGUN, AMS55, NATIONAL BUREAU OF STANDARDS, 1965, CHAPTER 9.
C
C         ASYMPTOTICS AND SPECIAL FUNCTIONS BY F.W.J. OLVER, ACADEMIC
C         PRESS, N.Y., 1974, PAGE 420
C
C     ABSTRACT
C         ZUNHJ COMPUTES PARAMETERS FOR BESSEL FUNCTIONS C(FNU,Z) =
C         J(FNU,Z), Y(FNU,Z) OR H(I,FNU,Z) I=1,2 FOR LARGE ORDERS FNU
C         BY MEANS OF THE UNIFORM ASYMPTOTIC EXPANSION
C
C         C(FNU,Z)=C1*PHI*( ASUM*AIRY(ARG) + C2*BSUM*DAIRY(ARG) )
C
C         FOR PROPER CHOICES OF C1, C2, AIRY AND DAIRY WHERE AIRY IS
C         AN AIRY FUNCTION AND DAIRY IS ITS DERIVATIVE.
C
C               (2/3)*FNU*ZETA**1.5 = ZETA1-ZETA2,
C
C         ZETA1=0.5*FNU*CLOG((1+W)/(1-W)), ZETA2=FNU*W FOR SCALING
C         PURPOSES IN AIRY FUNCTIONS FROM CAIRY OR CBIRY.
C
C         MCONJ=SIGN OF AIMAG(Z), BUT IS AMBIGUOUS WHEN Z IS REAL AND
C         MUST BE SPECIFIED. IPMTR=0 RETURNS ALL PARAMETERS. IPMTR=
C         1 COMPUTES ALL EXCEPT ASUM AND BSUM.
C
C***ROUTINES CALLED  AZABS,ZDIV,AZLOG,AZSQRT,D1MACH
C***END PROLOGUE  ZUNHJ
C     COMPLEX ARG,ASUM,BSUM,CFNU,CONE,CR,CZERO,DR,P,PHI,PRZTH,PTFN,
C    *RFN13,RTZTA,RZTH,SUMA,SUMB,TFN,T2,UP,W,W2,Z,ZA,ZB,ZC,ZETA,ZETA1,
C    *ZETA2,ZTH
      DOUBLE PRECISION ALFA, ANG, AP, AR, ARGI, ARGR, ASUMI, ASUMR,
     * ATOL, AW2, AZTH, BETA, BR, BSUMI, BSUMR, BTOL, C, CONEI, CONER,
     * CRI, CRR, DRI, DRR, EX1, EX2, FNU, FN13, FN23, GAMA, GPI, HPI,
     * PHII, PHIR, PI, PP, PR, PRZTHI, PRZTHR, PTFNI, PTFNR, RAW, RAW2,
     * RAZTH, RFNU, RFNU2, RFN13, RTZTI, RTZTR, RZTHI, RZTHR, STI, STR,
     * SUMAI, SUMAR, SUMBI, SUMBR, TEST, TFNI, TFNR, THPI, TOL, TZAI,
     * TZAR, T2I, T2R, UPI, UPR, WI, WR, W2I, W2R, ZAI, ZAR, ZBI, ZBR,
     * ZCI, ZCR, ZEROI, ZEROR, ZETAI, ZETAR, ZETA1I, ZETA1R, ZETA2I,
     * ZETA2R, ZI, ZR, ZTHI, ZTHR, AZABS, AC, D1MACH
      INTEGER IAS, IBS, IPMTR, IS, J, JR, JU, K, KMAX, KP1, KS, L, LR,
     * LRP1, L1, L2, M, IDUM
      DIMENSION AR(14), BR(14), C(105), ALFA(180), BETA(210), GAMA(30),
     * AP(30), PR(30), PI(30), UPR(14), UPI(14), CRR(14), CRI(14),
     * DRR(14), DRI(14)
      DATA AR(1), AR(2), AR(3), AR(4), AR(5), AR(6), AR(7), AR(8),
     1     AR(9), AR(10), AR(11), AR(12), AR(13), AR(14)/
     2     1.00000000000000000D+00,     1.04166666666666667D-01,
     3     8.35503472222222222D-02,     1.28226574556327160D-01,
     4     2.91849026464140464D-01,     8.81627267443757652D-01,
     5     3.32140828186276754D+00,     1.49957629868625547D+01,
     6     7.89230130115865181D+01,     4.74451538868264323D+02,
     7     3.20749009089066193D+03,     2.40865496408740049D+04,
     8     1.98923119169509794D+05,     1.79190200777534383D+06/
      DATA BR(1), BR(2), BR(3), BR(4), BR(5), BR(6), BR(7), BR(8),
     1     BR(9), BR(10), BR(11), BR(12), BR(13), BR(14)/
     2     1.00000000000000000D+00,    -1.45833333333333333D-01,
     3    -9.87413194444444444D-02,    -1.43312053915895062D-01,
     4    -3.17227202678413548D-01,    -9.42429147957120249D-01,
     5    -3.51120304082635426D+00,    -1.57272636203680451D+01,
     6    -8.22814390971859444D+01,    -4.92355370523670524D+02,
     7    -3.31621856854797251D+03,    -2.48276742452085896D+04,
     8    -2.04526587315129788D+05,    -1.83844491706820990D+06/
      DATA C(1), C(2), C(3), C(4), C(5), C(6), C(7), C(8), C(9), C(10),
     1     C(11), C(12), C(13), C(14), C(15), C(16), C(17), C(18),
     2     C(19), C(20), C(21), C(22), C(23), C(24)/
     3     1.00000000000000000D+00,    -2.08333333333333333D-01,
     4     1.25000000000000000D-01,     3.34201388888888889D-01,
     5    -4.01041666666666667D-01,     7.03125000000000000D-02,
     6    -1.02581259645061728D+00,     1.84646267361111111D+00,
     7    -8.91210937500000000D-01,     7.32421875000000000D-02,
     8     4.66958442342624743D+00,    -1.12070026162229938D+01,
     9     8.78912353515625000D+00,    -2.36408691406250000D+00,
     A     1.12152099609375000D-01,    -2.82120725582002449D+01,
     B     8.46362176746007346D+01,    -9.18182415432400174D+01,
     C     4.25349987453884549D+01,    -7.36879435947963170D+00,
     D     2.27108001708984375D-01,     2.12570130039217123D+02,
     E    -7.65252468141181642D+02,     1.05999045252799988D+03/
      DATA C(25), C(26), C(27), C(28), C(29), C(30), C(31), C(32),
     1     C(33), C(34), C(35), C(36), C(37), C(38), C(39), C(40),
     2     C(41), C(42), C(43), C(44), C(45), C(46), C(47), C(48)/
     3    -6.99579627376132541D+02,     2.18190511744211590D+02,
     4    -2.64914304869515555D+01,     5.72501420974731445D-01,
     5    -1.91945766231840700D+03,     8.06172218173730938D+03,
     6    -1.35865500064341374D+04,     1.16553933368645332D+04,
     7    -5.30564697861340311D+03,     1.20090291321635246D+03,
     8    -1.08090919788394656D+02,     1.72772750258445740D+00,
     9     2.02042913309661486D+04,    -9.69805983886375135D+04,
     A     1.92547001232531532D+05,    -2.03400177280415534D+05,
     B     1.22200464983017460D+05,    -4.11926549688975513D+04,
     C     7.10951430248936372D+03,    -4.93915304773088012D+02,
     D     6.07404200127348304D+00,    -2.42919187900551333D+05,
     E     1.31176361466297720D+06,    -2.99801591853810675D+06/
      DATA C(49), C(50), C(51), C(52), C(53), C(54), C(55), C(56),
     1     C(57), C(58), C(59), C(60), C(61), C(62), C(63), C(64),
     2     C(65), C(66), C(67), C(68), C(69), C(70), C(71), C(72)/
     3     3.76327129765640400D+06,    -2.81356322658653411D+06,
     4     1.26836527332162478D+06,    -3.31645172484563578D+05,
     5     4.52187689813627263D+04,    -2.49983048181120962D+03,
     6     2.43805296995560639D+01,     3.28446985307203782D+06,
     7    -1.97068191184322269D+07,     5.09526024926646422D+07,
     8    -7.41051482115326577D+07,     6.63445122747290267D+07,
     9    -3.75671766607633513D+07,     1.32887671664218183D+07,
     A    -2.78561812808645469D+06,     3.08186404612662398D+05,
     B    -1.38860897537170405D+04,     1.10017140269246738D+02,
     C    -4.93292536645099620D+07,     3.25573074185765749D+08,
     D    -9.39462359681578403D+08,     1.55359689957058006D+09,
     E    -1.62108055210833708D+09,     1.10684281682301447D+09/
      DATA C(73), C(74), C(75), C(76), C(77), C(78), C(79), C(80),
     1     C(81), C(82), C(83), C(84), C(85), C(86), C(87), C(88),
     2     C(89), C(90), C(91), C(92), C(93), C(94), C(95), C(96)/
     3    -4.95889784275030309D+08,     1.42062907797533095D+08,
     4    -2.44740627257387285D+07,     2.24376817792244943D+06,
     5    -8.40054336030240853D+04,     5.51335896122020586D+02,
     6     8.14789096118312115D+08,    -5.86648149205184723D+09,
     7     1.86882075092958249D+10,    -3.46320433881587779D+10,
     8     4.12801855797539740D+10,    -3.30265997498007231D+10,
     9     1.79542137311556001D+10,    -6.56329379261928433D+09,
     A     1.55927986487925751D+09,    -2.25105661889415278D+08,
     B     1.73951075539781645D+07,    -5.49842327572288687D+05,
     C     3.03809051092238427D+03,    -1.46792612476956167D+10,
     D     1.14498237732025810D+11,    -3.99096175224466498D+11,
     E     8.19218669548577329D+11,    -1.09837515608122331D+12/
      DATA C(97), C(98), C(99), C(100), C(101), C(102), C(103), C(104),
     1     C(105)/
     2     1.00815810686538209D+12,    -6.45364869245376503D+11,
     3     2.87900649906150589D+11,    -8.78670721780232657D+10,
     4     1.76347306068349694D+10,    -2.16716498322379509D+09,
     5     1.43157876718888981D+08,    -3.87183344257261262D+06,
     6     1.82577554742931747D+04/
      DATA ALFA(1), ALFA(2), ALFA(3), ALFA(4), ALFA(5), ALFA(6),
     1     ALFA(7), ALFA(8), ALFA(9), ALFA(10), ALFA(11), ALFA(12),
     2     ALFA(13), ALFA(14), ALFA(15), ALFA(16), ALFA(17), ALFA(18),
     3     ALFA(19), ALFA(20), ALFA(21), ALFA(22)/
     4    -4.44444444444444444D-03,    -9.22077922077922078D-04,
     5    -8.84892884892884893D-05,     1.65927687832449737D-04,
     6     2.46691372741792910D-04,     2.65995589346254780D-04,
     7     2.61824297061500945D-04,     2.48730437344655609D-04,
     8     2.32721040083232098D-04,     2.16362485712365082D-04,
     9     2.00738858762752355D-04,     1.86267636637545172D-04,
     A     1.73060775917876493D-04,     1.61091705929015752D-04,
     B     1.50274774160908134D-04,     1.40503497391269794D-04,
     C     1.31668816545922806D-04,     1.23667445598253261D-04,
     D     1.16405271474737902D-04,     1.09798298372713369D-04,
     E     1.03772410422992823D-04,     9.82626078369363448D-05/
      DATA ALFA(23), ALFA(24), ALFA(25), ALFA(26), ALFA(27), ALFA(28),
     1     ALFA(29), ALFA(30), ALFA(31), ALFA(32), ALFA(33), ALFA(34),
     2     ALFA(35), ALFA(36), ALFA(37), ALFA(38), ALFA(39), ALFA(40),
     3     ALFA(41), ALFA(42), ALFA(43), ALFA(44)/
     4     9.32120517249503256D-05,     8.85710852478711718D-05,
     5     8.42963105715700223D-05,     8.03497548407791151D-05,
     6     7.66981345359207388D-05,     7.33122157481777809D-05,
     7     7.01662625163141333D-05,     6.72375633790160292D-05,
     8     6.93735541354588974D-04,     2.32241745182921654D-04,
     9    -1.41986273556691197D-05,    -1.16444931672048640D-04,
     A    -1.50803558053048762D-04,    -1.55121924918096223D-04,
     B    -1.46809756646465549D-04,    -1.33815503867491367D-04,
     C    -1.19744975684254051D-04,    -1.06184319207974020D-04,
     D    -9.37699549891194492D-05,    -8.26923045588193274D-05,
     E    -7.29374348155221211D-05,    -6.44042357721016283D-05/
      DATA ALFA(45), ALFA(46), ALFA(47), ALFA(48), ALFA(49), ALFA(50),
     1     ALFA(51), ALFA(52), ALFA(53), ALFA(54), ALFA(55), ALFA(56),
     2     ALFA(57), ALFA(58), ALFA(59), ALFA(60), ALFA(61), ALFA(62),
     3     ALFA(63), ALFA(64), ALFA(65), ALFA(66)/
     4    -5.69611566009369048D-05,    -5.04731044303561628D-05,
     5    -4.48134868008882786D-05,    -3.98688727717598864D-05,
     6    -3.55400532972042498D-05,    -3.17414256609022480D-05,
     7    -2.83996793904174811D-05,    -2.54522720634870566D-05,
     8    -2.28459297164724555D-05,    -2.05352753106480604D-05,
     9    -1.84816217627666085D-05,    -1.66519330021393806D-05,
     A    -1.50179412980119482D-05,    -1.35554031379040526D-05,
     B    -1.22434746473858131D-05,    -1.10641884811308169D-05,
     C    -3.54211971457743841D-04,    -1.56161263945159416D-04,
     D     3.04465503594936410D-05,     1.30198655773242693D-04,
     E     1.67471106699712269D-04,     1.70222587683592569D-04/
      DATA ALFA(67), ALFA(68), ALFA(69), ALFA(70), ALFA(71), ALFA(72),
     1     ALFA(73), ALFA(74), ALFA(75), ALFA(76), ALFA(77), ALFA(78),
     2     ALFA(79), ALFA(80), ALFA(81), ALFA(82), ALFA(83), ALFA(84),
     3     ALFA(85), ALFA(86), ALFA(87), ALFA(88)/
     4     1.56501427608594704D-04,     1.36339170977445120D-04,
     5     1.14886692029825128D-04,     9.45869093034688111D-05,
     6     7.64498419250898258D-05,     6.07570334965197354D-05,
     7     4.74394299290508799D-05,     3.62757512005344297D-05,
     8     2.69939714979224901D-05,     1.93210938247939253D-05,
     9     1.30056674793963203D-05,     7.82620866744496661D-06,
     A     3.59257485819351583D-06,     1.44040049814251817D-07,
     B    -2.65396769697939116D-06,    -4.91346867098485910D-06,
     C    -6.72739296091248287D-06,    -8.17269379678657923D-06,
     D    -9.31304715093561232D-06,    -1.02011418798016441D-05,
     E    -1.08805962510592880D-05,    -1.13875481509603555D-05/
      DATA ALFA(89), ALFA(90), ALFA(91), ALFA(92), ALFA(93), ALFA(94),
     1     ALFA(95), ALFA(96), ALFA(97), ALFA(98), ALFA(99), ALFA(100),
     2     ALFA(101), ALFA(102), ALFA(103), ALFA(104), ALFA(105),
     3     ALFA(106), ALFA(107), ALFA(108), ALFA(109), ALFA(110)/
     4    -1.17519675674556414D-05,    -1.19987364870944141D-05,
     5     3.78194199201772914D-04,     2.02471952761816167D-04,
     6    -6.37938506318862408D-05,    -2.38598230603005903D-04,
     7    -3.10916256027361568D-04,    -3.13680115247576316D-04,
     8    -2.78950273791323387D-04,    -2.28564082619141374D-04,
     9    -1.75245280340846749D-04,    -1.25544063060690348D-04,
     A    -8.22982872820208365D-05,    -4.62860730588116458D-05,
     B    -1.72334302366962267D-05,     5.60690482304602267D-06,
     C     2.31395443148286800D-05,     3.62642745856793957D-05,
     D     4.58006124490188752D-05,     5.24595294959114050D-05,
     E     5.68396208545815266D-05,     5.94349820393104052D-05/
      DATA ALFA(111), ALFA(112), ALFA(113), ALFA(114), ALFA(115),
     1     ALFA(116), ALFA(117), ALFA(118), ALFA(119), ALFA(120),
     2     ALFA(121), ALFA(122), ALFA(123), ALFA(124), ALFA(125),
     3     ALFA(126), ALFA(127), ALFA(128), ALFA(129), ALFA(130)/
     4     6.06478527578421742D-05,     6.08023907788436497D-05,
     5     6.01577894539460388D-05,     5.89199657344698500D-05,
     6     5.72515823777593053D-05,     5.52804375585852577D-05,
     7     5.31063773802880170D-05,     5.08069302012325706D-05,
     8     4.84418647620094842D-05,     4.60568581607475370D-05,
     9    -6.91141397288294174D-04,    -4.29976633058871912D-04,
     A     1.83067735980039018D-04,     6.60088147542014144D-04,
     B     8.75964969951185931D-04,     8.77335235958235514D-04,
     C     7.49369585378990637D-04,     5.63832329756980918D-04,
     D     3.68059319971443156D-04,     1.88464535514455599D-04/
      DATA ALFA(131), ALFA(132), ALFA(133), ALFA(134), ALFA(135),
     1     ALFA(136), ALFA(137), ALFA(138), ALFA(139), ALFA(140),
     2     ALFA(141), ALFA(142), ALFA(143), ALFA(144), ALFA(145),
     3     ALFA(146), ALFA(147), ALFA(148), ALFA(149), ALFA(150)/
     4     3.70663057664904149D-05,    -8.28520220232137023D-05,
     5    -1.72751952869172998D-04,    -2.36314873605872983D-04,
     6    -2.77966150694906658D-04,    -3.02079514155456919D-04,
     7    -3.12594712643820127D-04,    -3.12872558758067163D-04,
     8    -3.05678038466324377D-04,    -2.93226470614557331D-04,
     9    -2.77255655582934777D-04,    -2.59103928467031709D-04,
     A    -2.39784014396480342D-04,    -2.20048260045422848D-04,
     B    -2.00443911094971498D-04,    -1.81358692210970687D-04,
     C    -1.63057674478657464D-04,    -1.45712672175205844D-04,
     D    -1.29425421983924587D-04,    -1.14245691942445952D-04/
      DATA ALFA(151), ALFA(152), ALFA(153), ALFA(154), ALFA(155),
     1     ALFA(156), ALFA(157), ALFA(158), ALFA(159), ALFA(160),
     2     ALFA(161), ALFA(162), ALFA(163), ALFA(164), ALFA(165),
     3     ALFA(166), ALFA(167), ALFA(168), ALFA(169), ALFA(170)/
     4     1.92821964248775885D-03,     1.35592576302022234D-03,
     5    -7.17858090421302995D-04,    -2.58084802575270346D-03,
     6    -3.49271130826168475D-03,    -3.46986299340960628D-03,
     7    -2.82285233351310182D-03,    -1.88103076404891354D-03,
     8    -8.89531718383947600D-04,     3.87912102631035228D-06,
     9     7.28688540119691412D-04,     1.26566373053457758D-03,
     A     1.62518158372674427D-03,     1.83203153216373172D-03,
     B     1.91588388990527909D-03,     1.90588846755546138D-03,
     C     1.82798982421825727D-03,     1.70389506421121530D-03,
     D     1.55097127171097686D-03,     1.38261421852276159D-03/
      DATA ALFA(171), ALFA(172), ALFA(173), ALFA(174), ALFA(175),
     1     ALFA(176), ALFA(177), ALFA(178), ALFA(179), ALFA(180)/
     2     1.20881424230064774D-03,     1.03676532638344962D-03,
     3     8.71437918068619115D-04,     7.16080155297701002D-04,
     4     5.72637002558129372D-04,     4.42089819465802277D-04,
     5     3.24724948503090564D-04,     2.20342042730246599D-04,
     6     1.28412898401353882D-04,     4.82005924552095464D-05/
      DATA BETA(1), BETA(2), BETA(3), BETA(4), BETA(5), BETA(6),
     1     BETA(7), BETA(8), BETA(9), BETA(10), BETA(11), BETA(12),
     2     BETA(13), BETA(14), BETA(15), BETA(16), BETA(17), BETA(18),
     3     BETA(19), BETA(20), BETA(21), BETA(22)/
     4     1.79988721413553309D-02,     5.59964911064388073D-03,
     5     2.88501402231132779D-03,     1.80096606761053941D-03,
     6     1.24753110589199202D-03,     9.22878876572938311D-04,
     7     7.14430421727287357D-04,     5.71787281789704872D-04,
     8     4.69431007606481533D-04,     3.93232835462916638D-04,
     9     3.34818889318297664D-04,     2.88952148495751517D-04,
     A     2.52211615549573284D-04,     2.22280580798883327D-04,
     B     1.97541838033062524D-04,     1.76836855019718004D-04,
     C     1.59316899661821081D-04,     1.44347930197333986D-04,
     D     1.31448068119965379D-04,     1.20245444949302884D-04,
     E     1.10449144504599392D-04,     1.01828770740567258D-04/
      DATA BETA(23), BETA(24), BETA(25), BETA(26), BETA(27), BETA(28),
     1     BETA(29), BETA(30), BETA(31), BETA(32), BETA(33), BETA(34),
     2     BETA(35), BETA(36), BETA(37), BETA(38), BETA(39), BETA(40),
     3     BETA(41), BETA(42), BETA(43), BETA(44)/
     4     9.41998224204237509D-05,     8.74130545753834437D-05,
     5     8.13466262162801467D-05,     7.59002269646219339D-05,
     6     7.09906300634153481D-05,     6.65482874842468183D-05,
     7     6.25146958969275078D-05,     5.88403394426251749D-05,
     8    -1.49282953213429172D-03,    -8.78204709546389328D-04,
     9    -5.02916549572034614D-04,    -2.94822138512746025D-04,
     A    -1.75463996970782828D-04,    -1.04008550460816434D-04,
     B    -5.96141953046457895D-05,    -3.12038929076098340D-05,
     C    -1.26089735980230047D-05,    -2.42892608575730389D-07,
     D     8.05996165414273571D-06,     1.36507009262147391D-05,
     E     1.73964125472926261D-05,     1.98672978842133780D-05/
      DATA BETA(45), BETA(46), BETA(47), BETA(48), BETA(49), BETA(50),
     1     BETA(51), BETA(52), BETA(53), BETA(54), BETA(55), BETA(56),
     2     BETA(57), BETA(58), BETA(59), BETA(60), BETA(61), BETA(62),
     3     BETA(63), BETA(64), BETA(65), BETA(66)/
     4     2.14463263790822639D-05,     2.23954659232456514D-05,
     5     2.28967783814712629D-05,     2.30785389811177817D-05,
     6     2.30321976080909144D-05,     2.28236073720348722D-05,
     7     2.25005881105292418D-05,     2.20981015361991429D-05,
     8     2.16418427448103905D-05,     2.11507649256220843D-05,
     9     2.06388749782170737D-05,     2.01165241997081666D-05,
     A     1.95913450141179244D-05,     1.90689367910436740D-05,
     B     1.85533719641636667D-05,     1.80475722259674218D-05,
     C     5.52213076721292790D-04,     4.47932581552384646D-04,
     D     2.79520653992020589D-04,     1.52468156198446602D-04,
     E     6.93271105657043598D-05,     1.76258683069991397D-05/
      DATA BETA(67), BETA(68), BETA(69), BETA(70), BETA(71), BETA(72),
     1     BETA(73), BETA(74), BETA(75), BETA(76), BETA(77), BETA(78),
     2     BETA(79), BETA(80), BETA(81), BETA(82), BETA(83), BETA(84),
     3     BETA(85), BETA(86), BETA(87), BETA(88)/
     4    -1.35744996343269136D-05,    -3.17972413350427135D-05,
     5    -4.18861861696693365D-05,    -4.69004889379141029D-05,
     6    -4.87665447413787352D-05,    -4.87010031186735069D-05,
     7    -4.74755620890086638D-05,    -4.55813058138628452D-05,
     8    -4.33309644511266036D-05,    -4.09230193157750364D-05,
     9    -3.84822638603221274D-05,    -3.60857167535410501D-05,
     A    -3.37793306123367417D-05,    -3.15888560772109621D-05,
     B    -2.95269561750807315D-05,    -2.75978914828335759D-05,
     C    -2.58006174666883713D-05,    -2.41308356761280200D-05,
     D    -2.25823509518346033D-05,    -2.11479656768912971D-05,
     E    -1.98200638885294927D-05,    -1.85909870801065077D-05/
      DATA BETA(89), BETA(90), BETA(91), BETA(92), BETA(93), BETA(94),
     1     BETA(95), BETA(96), BETA(97), BETA(98), BETA(99), BETA(100),
     2     BETA(101), BETA(102), BETA(103), BETA(104), BETA(105),
     3     BETA(106), BETA(107), BETA(108), BETA(109), BETA(110)/
     4    -1.74532699844210224D-05,    -1.63997823854497997D-05,
     5    -4.74617796559959808D-04,    -4.77864567147321487D-04,
     6    -3.20390228067037603D-04,    -1.61105016119962282D-04,
     7    -4.25778101285435204D-05,     3.44571294294967503D-05,
     8     7.97092684075674924D-05,     1.03138236708272200D-04,
     9     1.12466775262204158D-04,     1.13103642108481389D-04,
     A     1.08651634848774268D-04,     1.01437951597661973D-04,
     B     9.29298396593363896D-05,     8.40293133016089978D-05,
     C     7.52727991349134062D-05,     6.69632521975730872D-05,
     D     5.92564547323194704D-05,     5.22169308826975567D-05,
     E     4.58539485165360646D-05,     4.01445513891486808D-05/
      DATA BETA(111), BETA(112), BETA(113), BETA(114), BETA(115),
     1     BETA(116), BETA(117), BETA(118), BETA(119), BETA(120),
     2     BETA(121), BETA(122), BETA(123), BETA(124), BETA(125),
     3     BETA(126), BETA(127), BETA(128), BETA(129), BETA(130)/
     4     3.50481730031328081D-05,     3.05157995034346659D-05,
     5     2.64956119950516039D-05,     2.29363633690998152D-05,
     6     1.97893056664021636D-05,     1.70091984636412623D-05,
     7     1.45547428261524004D-05,     1.23886640995878413D-05,
     8     1.04775876076583236D-05,     8.79179954978479373D-06,
     9     7.36465810572578444D-04,     8.72790805146193976D-04,
     A     6.22614862573135066D-04,     2.85998154194304147D-04,
     B     3.84737672879366102D-06,    -1.87906003636971558D-04,
     C    -2.97603646594554535D-04,    -3.45998126832656348D-04,
     D    -3.53382470916037712D-04,    -3.35715635775048757D-04/
      DATA BETA(131), BETA(132), BETA(133), BETA(134), BETA(135),
     1     BETA(136), BETA(137), BETA(138), BETA(139), BETA(140),
     2     BETA(141), BETA(142), BETA(143), BETA(144), BETA(145),
     3     BETA(146), BETA(147), BETA(148), BETA(149), BETA(150)/
     4    -3.04321124789039809D-04,    -2.66722723047612821D-04,
     5    -2.27654214122819527D-04,    -1.89922611854562356D-04,
     6    -1.55058918599093870D-04,    -1.23778240761873630D-04,
     7    -9.62926147717644187D-05,    -7.25178327714425337D-05,
     8    -5.22070028895633801D-05,    -3.50347750511900522D-05,
     9    -2.06489761035551757D-05,    -8.70106096849767054D-06,
     A     1.13698686675100290D-06,     9.16426474122778849D-06,
     B     1.56477785428872620D-05,     2.08223629482466847D-05,
     C     2.48923381004595156D-05,     2.80340509574146325D-05,
     D     3.03987774629861915D-05,     3.21156731406700616D-05/
      DATA BETA(151), BETA(152), BETA(153), BETA(154), BETA(155),
     1     BETA(156), BETA(157), BETA(158), BETA(159), BETA(160),
     2     BETA(161), BETA(162), BETA(163), BETA(164), BETA(165),
     3     BETA(166), BETA(167), BETA(168), BETA(169), BETA(170)/
     4    -1.80182191963885708D-03,    -2.43402962938042533D-03,
     5    -1.83422663549856802D-03,    -7.62204596354009765D-04,
     6     2.39079475256927218D-04,     9.49266117176881141D-04,
     7     1.34467449701540359D-03,     1.48457495259449178D-03,
     8     1.44732339830617591D-03,     1.30268261285657186D-03,
     9     1.10351597375642682D-03,     8.86047440419791759D-04,
     A     6.73073208165665473D-04,     4.77603872856582378D-04,
     B     3.05991926358789362D-04,     1.60315694594721630D-04,
     C     4.00749555270613286D-05,    -5.66607461635251611D-05,
     D    -1.32506186772982638D-04,    -1.90296187989614057D-04/
      DATA BETA(171), BETA(172), BETA(173), BETA(174), BETA(175),
     1     BETA(176), BETA(177), BETA(178), BETA(179), BETA(180),
     2     BETA(181), BETA(182), BETA(183), BETA(184), BETA(185),
     3     BETA(186), BETA(187), BETA(188), BETA(189), BETA(190)/
     4    -2.32811450376937408D-04,    -2.62628811464668841D-04,
     5    -2.82050469867598672D-04,    -2.93081563192861167D-04,
     6    -2.97435962176316616D-04,    -2.96557334239348078D-04,
     7    -2.91647363312090861D-04,    -2.83696203837734166D-04,
     8    -2.73512317095673346D-04,    -2.61750155806768580D-04,
     9     6.38585891212050914D-03,     9.62374215806377941D-03,
     A     7.61878061207001043D-03,     2.83219055545628054D-03,
     B    -2.09841352012720090D-03,    -5.73826764216626498D-03,
     C    -7.70804244495414620D-03,    -8.21011692264844401D-03,
     D    -7.65824520346905413D-03,    -6.47209729391045177D-03/
      DATA BETA(191), BETA(192), BETA(193), BETA(194), BETA(195),
     1     BETA(196), BETA(197), BETA(198), BETA(199), BETA(200),
     2     BETA(201), BETA(202), BETA(203), BETA(204), BETA(205),
     3     BETA(206), BETA(207), BETA(208), BETA(209), BETA(210)/
     4    -4.99132412004966473D-03,    -3.45612289713133280D-03,
     5    -2.01785580014170775D-03,    -7.59430686781961401D-04,
     6     2.84173631523859138D-04,     1.10891667586337403D-03,
     7     1.72901493872728771D-03,     2.16812590802684701D-03,
     8     2.45357710494539735D-03,     2.61281821058334862D-03,
     9     2.67141039656276912D-03,     2.65203073395980430D-03,
     A     2.57411652877287315D-03,     2.45389126236094427D-03,
     B     2.30460058071795494D-03,     2.13684837686712662D-03,
     C     1.95896528478870911D-03,     1.77737008679454412D-03,
     D     1.59690280765839059D-03,     1.42111975664438546D-03/
      DATA GAMA(1), GAMA(2), GAMA(3), GAMA(4), GAMA(5), GAMA(6),
     1     GAMA(7), GAMA(8), GAMA(9), GAMA(10), GAMA(11), GAMA(12),
     2     GAMA(13), GAMA(14), GAMA(15), GAMA(16), GAMA(17), GAMA(18),
     3     GAMA(19), GAMA(20), GAMA(21), GAMA(22)/
     4     6.29960524947436582D-01,     2.51984209978974633D-01,
     5     1.54790300415655846D-01,     1.10713062416159013D-01,
     6     8.57309395527394825D-02,     6.97161316958684292D-02,
     7     5.86085671893713576D-02,     5.04698873536310685D-02,
     8     4.42600580689154809D-02,     3.93720661543509966D-02,
     9     3.54283195924455368D-02,     3.21818857502098231D-02,
     A     2.94646240791157679D-02,     2.71581677112934479D-02,
     B     2.51768272973861779D-02,     2.34570755306078891D-02,
     C     2.19508390134907203D-02,     2.06210828235646240D-02,
     D     1.94388240897880846D-02,     1.83810633800683158D-02,
     E     1.74293213231963172D-02,     1.65685837786612353D-02/
      DATA GAMA(23), GAMA(24), GAMA(25), GAMA(26), GAMA(27), GAMA(28),
     1     GAMA(29), GAMA(30)/
     2     1.57865285987918445D-02,     1.50729501494095594D-02,
     3     1.44193250839954639D-02,     1.38184805735341786D-02,
     4     1.32643378994276568D-02,     1.27517121970498651D-02,
     5     1.22761545318762767D-02,     1.18338262398482403D-02/
      DATA EX1, EX2, HPI, GPI, THPI /
     1     3.33333333333333333D-01,     6.66666666666666667D-01,
     2     1.57079632679489662D+00,     3.14159265358979324D+00,
     3     4.71238898038468986D+00/
      DATA ZEROR,ZEROI,CONER,CONEI / 0.0D0, 0.0D0, 1.0D0, 0.0D0 /
C
      RFNU = 1.0D0/FNU
C-----------------------------------------------------------------------
C     OVERFLOW TEST (Z/FNU TOO SMALL)
C-----------------------------------------------------------------------
      TEST = D1MACH(1)*1.0D+3
      AC = FNU*TEST
      IF (DABS(ZR).GT.AC .OR. DABS(ZI).GT.AC) GO TO 15
      ZETA1R = 2.0D0*DABS(DLOG(TEST))+FNU
      ZETA1I = 0.0D0
      ZETA2R = FNU
      ZETA2I = 0.0D0
      PHIR = 1.0D0
      PHII = 0.0D0
      ARGR = 1.0D0
      ARGI = 0.0D0
      RETURN
   15 CONTINUE
      ZBR = ZR*RFNU
      ZBI = ZI*RFNU
      RFNU2 = RFNU*RFNU
C-----------------------------------------------------------------------
C     COMPUTE IN THE FOURTH QUADRANT
C-----------------------------------------------------------------------
      FN13 = FNU**EX1
      FN23 = FN13*FN13
      RFN13 = 1.0D0/FN13
      W2R = CONER - ZBR*ZBR + ZBI*ZBI
      W2I = CONEI - ZBR*ZBI - ZBR*ZBI
      AW2 = AZABS(W2R,W2I)
      IF (AW2.GT.0.25D0) GO TO 130
C-----------------------------------------------------------------------
C     POWER SERIES FOR CABS(W2).LE.0.25D0
C-----------------------------------------------------------------------
      K = 1
      PR(1) = CONER
      PI(1) = CONEI
      SUMAR = GAMA(1)
      SUMAI = ZEROI
      AP(1) = 1.0D0
      IF (AW2.LT.TOL) GO TO 20
      DO 10 K=2,30
        PR(K) = PR(K-1)*W2R - PI(K-1)*W2I
        PI(K) = PR(K-1)*W2I + PI(K-1)*W2R
        SUMAR = SUMAR + PR(K)*GAMA(K)
        SUMAI = SUMAI + PI(K)*GAMA(K)
        AP(K) = AP(K-1)*AW2
        IF (AP(K).LT.TOL) GO TO 20
   10 CONTINUE
      K = 30
   20 CONTINUE
      KMAX = K
      ZETAR = W2R*SUMAR - W2I*SUMAI
      ZETAI = W2R*SUMAI + W2I*SUMAR
      ARGR = ZETAR*FN23
      ARGI = ZETAI*FN23
      CALL AZSQRT(SUMAR, SUMAI, ZAR, ZAI)
      CALL AZSQRT(W2R, W2I, STR, STI)
      ZETA2R = STR*FNU
      ZETA2I = STI*FNU
      STR = CONER + EX2*(ZETAR*ZAR-ZETAI*ZAI)
      STI = CONEI + EX2*(ZETAR*ZAI+ZETAI*ZAR)
      ZETA1R = STR*ZETA2R - STI*ZETA2I
      ZETA1I = STR*ZETA2I + STI*ZETA2R
      ZAR = ZAR + ZAR
      ZAI = ZAI + ZAI
      CALL AZSQRT(ZAR, ZAI, STR, STI)
      PHIR = STR*RFN13
      PHII = STI*RFN13
      IF (IPMTR.EQ.1) GO TO 120
C-----------------------------------------------------------------------
C     SUM SERIES FOR ASUM AND BSUM
C-----------------------------------------------------------------------
      SUMBR = ZEROR
      SUMBI = ZEROI
      DO 30 K=1,KMAX
        SUMBR = SUMBR + PR(K)*BETA(K)
        SUMBI = SUMBI + PI(K)*BETA(K)
   30 CONTINUE
      ASUMR = ZEROR
      ASUMI = ZEROI
      BSUMR = SUMBR
      BSUMI = SUMBI
      L1 = 0
      L2 = 30
      BTOL = TOL*(DABS(BSUMR)+DABS(BSUMI))
      ATOL = TOL
      PP = 1.0D0
      IAS = 0
      IBS = 0
      IF (RFNU2.LT.TOL) GO TO 110
      DO 100 IS=2,7
        ATOL = ATOL/RFNU2
        PP = PP*RFNU2
        IF (IAS.EQ.1) GO TO 60
        SUMAR = ZEROR
        SUMAI = ZEROI
        DO 40 K=1,KMAX
          M = L1 + K
          SUMAR = SUMAR + PR(K)*ALFA(M)
          SUMAI = SUMAI + PI(K)*ALFA(M)
          IF (AP(K).LT.ATOL) GO TO 50
   40   CONTINUE
   50   CONTINUE
        ASUMR = ASUMR + SUMAR*PP
        ASUMI = ASUMI + SUMAI*PP
        IF (PP.LT.TOL) IAS = 1
   60   CONTINUE
        IF (IBS.EQ.1) GO TO 90
        SUMBR = ZEROR
        SUMBI = ZEROI
        DO 70 K=1,KMAX
          M = L2 + K
          SUMBR = SUMBR + PR(K)*BETA(M)
          SUMBI = SUMBI + PI(K)*BETA(M)
          IF (AP(K).LT.ATOL) GO TO 80
   70   CONTINUE
   80   CONTINUE
        BSUMR = BSUMR + SUMBR*PP
        BSUMI = BSUMI + SUMBI*PP
        IF (PP.LT.BTOL) IBS = 1
   90   CONTINUE
        IF (IAS.EQ.1 .AND. IBS.EQ.1) GO TO 110
        L1 = L1 + 30
        L2 = L2 + 30
  100 CONTINUE
  110 CONTINUE
      ASUMR = ASUMR + CONER
      PP = RFNU*RFN13
      BSUMR = BSUMR*PP
      BSUMI = BSUMI*PP
  120 CONTINUE
      RETURN
C-----------------------------------------------------------------------
C     CABS(W2).GT.0.25D0
C-----------------------------------------------------------------------
  130 CONTINUE
      CALL AZSQRT(W2R, W2I, WR, WI)
      IF (WR.LT.0.0D0) WR = 0.0D0
      IF (WI.LT.0.0D0) WI = 0.0D0
      STR = CONER + WR
      STI = WI
      CALL ZDIV(STR, STI, ZBR, ZBI, ZAR, ZAI)
      CALL AZLOG(ZAR, ZAI, ZCR, ZCI, IDUM)
      IF (ZCI.LT.0.0D0) ZCI = 0.0D0
      IF (ZCI.GT.HPI) ZCI = HPI
      IF (ZCR.LT.0.0D0) ZCR = 0.0D0
      ZTHR = (ZCR-WR)*1.5D0
      ZTHI = (ZCI-WI)*1.5D0
      ZETA1R = ZCR*FNU
      ZETA1I = ZCI*FNU
      ZETA2R = WR*FNU
      ZETA2I = WI*FNU
      AZTH = AZABS(ZTHR,ZTHI)
      ANG = THPI
      IF (ZTHR.GE.0.0D0 .AND. ZTHI.LT.0.0D0) GO TO 140
      ANG = HPI
      IF (ZTHR.EQ.0.0D0) GO TO 140
      ANG = DATAN(ZTHI/ZTHR)
      IF (ZTHR.LT.0.0D0) ANG = ANG + GPI
  140 CONTINUE
      PP = AZTH**EX2
      ANG = ANG*EX2
      ZETAR = PP*DCOS(ANG)
      ZETAI = PP*DSIN(ANG)
      IF (ZETAI.LT.0.0D0) ZETAI = 0.0D0
      ARGR = ZETAR*FN23
      ARGI = ZETAI*FN23
      CALL ZDIV(ZTHR, ZTHI, ZETAR, ZETAI, RTZTR, RTZTI)
      CALL ZDIV(RTZTR, RTZTI, WR, WI, ZAR, ZAI)
      TZAR = ZAR + ZAR
      TZAI = ZAI + ZAI
      CALL AZSQRT(TZAR, TZAI, STR, STI)
      PHIR = STR*RFN13
      PHII = STI*RFN13
      IF (IPMTR.EQ.1) GO TO 120
      RAW = 1.0D0/DSQRT(AW2)
      STR = WR*RAW
      STI = -WI*RAW
      TFNR = STR*RFNU*RAW
      TFNI = STI*RFNU*RAW
      RAZTH = 1.0D0/AZTH
      STR = ZTHR*RAZTH
      STI = -ZTHI*RAZTH
      RZTHR = STR*RAZTH*RFNU
      RZTHI = STI*RAZTH*RFNU
      ZCR = RZTHR*AR(2)
      ZCI = RZTHI*AR(2)
      RAW2 = 1.0D0/AW2
      STR = W2R*RAW2
      STI = -W2I*RAW2
      T2R = STR*RAW2
      T2I = STI*RAW2
      STR = T2R*C(2) + C(3)
      STI = T2I*C(2)
      UPR(2) = STR*TFNR - STI*TFNI
      UPI(2) = STR*TFNI + STI*TFNR
      BSUMR = UPR(2) + ZCR
      BSUMI = UPI(2) + ZCI
      ASUMR = ZEROR
      ASUMI = ZEROI
      IF (RFNU.LT.TOL) GO TO 220
      PRZTHR = RZTHR
      PRZTHI = RZTHI
      PTFNR = TFNR
      PTFNI = TFNI
      UPR(1) = CONER
      UPI(1) = CONEI
      PP = 1.0D0
      BTOL = TOL*(DABS(BSUMR)+DABS(BSUMI))
      KS = 0
      KP1 = 2
      L = 3
      IAS = 0
      IBS = 0
      DO 210 LR=2,12,2
        LRP1 = LR + 1
C-----------------------------------------------------------------------
C     COMPUTE TWO ADDITIONAL CR, DR, AND UP FOR TWO MORE TERMS IN
C     NEXT SUMA AND SUMB
C-----------------------------------------------------------------------
        DO 160 K=LR,LRP1
          KS = KS + 1
          KP1 = KP1 + 1
          L = L + 1
          ZAR = C(L)
          ZAI = ZEROI
          DO 150 J=2,KP1
            L = L + 1
            STR = ZAR*T2R - T2I*ZAI + C(L)
            ZAI = ZAR*T2I + ZAI*T2R
            ZAR = STR
  150     CONTINUE
          STR = PTFNR*TFNR - PTFNI*TFNI
          PTFNI = PTFNR*TFNI + PTFNI*TFNR
          PTFNR = STR
          UPR(KP1) = PTFNR*ZAR - PTFNI*ZAI
          UPI(KP1) = PTFNI*ZAR + PTFNR*ZAI
          CRR(KS) = PRZTHR*BR(KS+1)
          CRI(KS) = PRZTHI*BR(KS+1)
          STR = PRZTHR*RZTHR - PRZTHI*RZTHI
          PRZTHI = PRZTHR*RZTHI + PRZTHI*RZTHR
          PRZTHR = STR
          DRR(KS) = PRZTHR*AR(KS+2)
          DRI(KS) = PRZTHI*AR(KS+2)
  160   CONTINUE
        PP = PP*RFNU2
        IF (IAS.EQ.1) GO TO 180
        SUMAR = UPR(LRP1)
        SUMAI = UPI(LRP1)
        JU = LRP1
        DO 170 JR=1,LR
          JU = JU - 1
          SUMAR = SUMAR + CRR(JR)*UPR(JU) - CRI(JR)*UPI(JU)
          SUMAI = SUMAI + CRR(JR)*UPI(JU) + CRI(JR)*UPR(JU)
  170   CONTINUE
        ASUMR = ASUMR + SUMAR
        ASUMI = ASUMI + SUMAI
        TEST = DABS(SUMAR) + DABS(SUMAI)
        IF (PP.LT.TOL .AND. TEST.LT.TOL) IAS = 1
  180   CONTINUE
        IF (IBS.EQ.1) GO TO 200
        SUMBR = UPR(LR+2) + UPR(LRP1)*ZCR - UPI(LRP1)*ZCI
        SUMBI = UPI(LR+2) + UPR(LRP1)*ZCI + UPI(LRP1)*ZCR
        JU = LRP1
        DO 190 JR=1,LR
          JU = JU - 1
          SUMBR = SUMBR + DRR(JR)*UPR(JU) - DRI(JR)*UPI(JU)
          SUMBI = SUMBI + DRR(JR)*UPI(JU) + DRI(JR)*UPR(JU)
  190   CONTINUE
        BSUMR = BSUMR + SUMBR
        BSUMI = BSUMI + SUMBI
        TEST = DABS(SUMBR) + DABS(SUMBI)
        IF (PP.LT.BTOL .AND. TEST.LT.BTOL) IBS = 1
  200   CONTINUE
        IF (IAS.EQ.1 .AND. IBS.EQ.1) GO TO 220
  210 CONTINUE
  220 CONTINUE
      ASUMR = ASUMR + CONER
      STR = -BSUMR*RFN13
      STI = -BSUMI*RFN13
      CALL ZDIV(STR, STI, RTZTR, RTZTI, BSUMR, BSUMI)
      GO TO 120
      END
      SUBROUTINE ZUNI1(ZR, ZI, FNU, KODE, N, YR, YI, NZ, NLAST, FNUL,
     * TOL, ELIM, ALIM)
C***BEGIN PROLOGUE  ZUNI1
C***REFER TO  ZBESI,ZBESK
C
C     ZUNI1 COMPUTES I(FNU,Z)  BY MEANS OF THE UNIFORM ASYMPTOTIC
C     EXPANSION FOR I(FNU,Z) IN -PI/3.LE.ARG Z.LE.PI/3.
C
C     FNUL IS THE SMALLEST ORDER PERMITTED FOR THE ASYMPTOTIC
C     EXPANSION. NLAST=0 MEANS ALL OF THE Y VALUES WERE SET.
C     NLAST.NE.0 IS THE NUMBER LEFT TO BE COMPUTED BY ANOTHER
C     FORMULA FOR ORDERS FNU TO FNU+NLAST-1 BECAUSE FNU+NLAST-1.LT.FNUL.
C     Y(I)=CZERO FOR I=NLAST+1,N
C
C***ROUTINES CALLED  ZUCHK,ZUNIK,ZUOIK,D1MACH,AZABS
C***END PROLOGUE  ZUNI1
C     COMPLEX CFN,CONE,CRSC,CSCL,CSR,CSS,CWRK,CZERO,C1,C2,PHI,RZ,SUM,S1,
C    *S2,Y,Z,ZETA1,ZETA2
      DOUBLE PRECISION ALIM, APHI, ASCLE, BRY, CONER, CRSC,
     * CSCL, CSRR, CSSR, CWRKI, CWRKR, C1R, C2I, C2M, C2R, ELIM, FN,
     * FNU, FNUL, PHII, PHIR, RAST, RS1, RZI, RZR, STI, STR, SUMI,
     * SUMR, S1I, S1R, S2I, S2R, TOL, YI, YR, ZEROI, ZEROR, ZETA1I,
     * ZETA1R, ZETA2I, ZETA2R, ZI, ZR, CYR, CYI, D1MACH, AZABS
      INTEGER I, IFLAG, INIT, K, KODE, M, N, ND, NLAST, NN, NUF, NW, NZ
      DIMENSION BRY(3), YR(N), YI(N), CWRKR(16), CWRKI(16), CSSR(3),
     * CSRR(3), CYR(2), CYI(2)
      DATA ZEROR,ZEROI,CONER / 0.0D0, 0.0D0, 1.0D0 /
C
      NZ = 0
      ND = N
      NLAST = 0
C-----------------------------------------------------------------------
C     COMPUTED VALUES WITH EXPONENTS BETWEEN ALIM AND ELIM IN MAG-
C     NITUDE ARE SCALED TO KEEP INTERMEDIATE ARITHMETIC ON SCALE,
C     EXP(ALIM)=EXP(ELIM)*TOL
C-----------------------------------------------------------------------
      CSCL = 1.0D0/TOL
      CRSC = TOL
      CSSR(1) = CSCL
      CSSR(2) = CONER
      CSSR(3) = CRSC
      CSRR(1) = CRSC
      CSRR(2) = CONER
      CSRR(3) = CSCL
      BRY(1) = 1.0D+3*D1MACH(1)/TOL
C-----------------------------------------------------------------------
C     CHECK FOR UNDERFLOW AND OVERFLOW ON FIRST MEMBER
C-----------------------------------------------------------------------
      FN = DMAX1(FNU,1.0D0)
      INIT = 0
      CALL ZUNIK(ZR, ZI, FN, 1, 1, TOL, INIT, PHIR, PHII, ZETA1R,
     * ZETA1I, ZETA2R, ZETA2I, SUMR, SUMI, CWRKR, CWRKI)
      IF (KODE.EQ.1) GO TO 10
      STR = ZR + ZETA2R
      STI = ZI + ZETA2I
      RAST = FN/AZABS(STR,STI)
      STR = STR*RAST*RAST
      STI = -STI*RAST*RAST
      S1R = -ZETA1R + STR
      S1I = -ZETA1I + STI
      GO TO 20
   10 CONTINUE
      S1R = -ZETA1R + ZETA2R
      S1I = -ZETA1I + ZETA2I
   20 CONTINUE
      RS1 = S1R
      IF (DABS(RS1).GT.ELIM) GO TO 130
   30 CONTINUE
      NN = MIN0(2,ND)
      DO 80 I=1,NN
        FN = FNU + DBLE(FLOAT(ND-I))
        INIT = 0
        CALL ZUNIK(ZR, ZI, FN, 1, 0, TOL, INIT, PHIR, PHII, ZETA1R,
     *   ZETA1I, ZETA2R, ZETA2I, SUMR, SUMI, CWRKR, CWRKI)
        IF (KODE.EQ.1) GO TO 40
        STR = ZR + ZETA2R
        STI = ZI + ZETA2I
        RAST = FN/AZABS(STR,STI)
        STR = STR*RAST*RAST
        STI = -STI*RAST*RAST
        S1R = -ZETA1R + STR
        S1I = -ZETA1I + STI + ZI
        GO TO 50
   40   CONTINUE
        S1R = -ZETA1R + ZETA2R
        S1I = -ZETA1I + ZETA2I
   50   CONTINUE
C-----------------------------------------------------------------------
C     TEST FOR UNDERFLOW AND OVERFLOW
C-----------------------------------------------------------------------
        RS1 = S1R
        IF (DABS(RS1).GT.ELIM) GO TO 110
        IF (I.EQ.1) IFLAG = 2
        IF (DABS(RS1).LT.ALIM) GO TO 60
C-----------------------------------------------------------------------
C     REFINE  TEST AND SCALE
C-----------------------------------------------------------------------
        APHI = AZABS(PHIR,PHII)
        RS1 = RS1 + DLOG(APHI)
        IF (DABS(RS1).GT.ELIM) GO TO 110
        IF (I.EQ.1) IFLAG = 1
        IF (RS1.LT.0.0D0) GO TO 60
        IF (I.EQ.1) IFLAG = 3
   60   CONTINUE
C-----------------------------------------------------------------------
C     SCALE S1 IF CABS(S1).LT.ASCLE
C-----------------------------------------------------------------------
        S2R = PHIR*SUMR - PHII*SUMI
        S2I = PHIR*SUMI + PHII*SUMR
        STR = DEXP(S1R)*CSSR(IFLAG)
        S1R = STR*DCOS(S1I)
        S1I = STR*DSIN(S1I)
        STR = S2R*S1R - S2I*S1I
        S2I = S2R*S1I + S2I*S1R
        S2R = STR
        IF (IFLAG.NE.1) GO TO 70
        CALL ZUCHK(S2R, S2I, NW, BRY(1), TOL)
        IF (NW.NE.0) GO TO 110
   70   CONTINUE
        CYR(I) = S2R
        CYI(I) = S2I
        M = ND - I + 1
        YR(M) = S2R*CSRR(IFLAG)
        YI(M) = S2I*CSRR(IFLAG)
   80 CONTINUE
      IF (ND.LE.2) GO TO 100
      RAST = 1.0D0/AZABS(ZR,ZI)
      STR = ZR*RAST
      STI = -ZI*RAST
      RZR = (STR+STR)*RAST
      RZI = (STI+STI)*RAST
      BRY(2) = 1.0D0/BRY(1)
      BRY(3) = D1MACH(2)
      S1R = CYR(1)
      S1I = CYI(1)
      S2R = CYR(2)
      S2I = CYI(2)
      C1R = CSRR(IFLAG)
      ASCLE = BRY(IFLAG)
      K = ND - 2
      FN = DBLE(FLOAT(K))
      DO 90 I=3,ND
        C2R = S2R
        C2I = S2I
        S2R = S1R + (FNU+FN)*(RZR*C2R-RZI*C2I)
        S2I = S1I + (FNU+FN)*(RZR*C2I+RZI*C2R)
        S1R = C2R
        S1I = C2I
        C2R = S2R*C1R
        C2I = S2I*C1R
        YR(K) = C2R
        YI(K) = C2I
        K = K - 1
        FN = FN - 1.0D0
        IF (IFLAG.GE.3) GO TO 90
        STR = DABS(C2R)
        STI = DABS(C2I)
        C2M = DMAX1(STR,STI)
        IF (C2M.LE.ASCLE) GO TO 90
        IFLAG = IFLAG + 1
        ASCLE = BRY(IFLAG)
        S1R = S1R*C1R
        S1I = S1I*C1R
        S2R = C2R
        S2I = C2I
        S1R = S1R*CSSR(IFLAG)
        S1I = S1I*CSSR(IFLAG)
        S2R = S2R*CSSR(IFLAG)
        S2I = S2I*CSSR(IFLAG)
        C1R = CSRR(IFLAG)
   90 CONTINUE
  100 CONTINUE
      RETURN
C-----------------------------------------------------------------------
C     SET UNDERFLOW AND UPDATE PARAMETERS
C-----------------------------------------------------------------------
  110 CONTINUE
      IF (RS1.GT.0.0D0) GO TO 120
      YR(ND) = ZEROR
      YI(ND) = ZEROI
      NZ = NZ + 1
      ND = ND - 1
      IF (ND.EQ.0) GO TO 100
      CALL ZUOIK(ZR, ZI, FNU, KODE, 1, ND, YR, YI, NUF, TOL, ELIM, ALIM)
      IF (NUF.LT.0) GO TO 120
      ND = ND - NUF
      NZ = NZ + NUF
      IF (ND.EQ.0) GO TO 100
      FN = FNU + DBLE(FLOAT(ND-1))
      IF (FN.GE.FNUL) GO TO 30
      NLAST = ND
      RETURN
  120 CONTINUE
      NZ = -1
      RETURN
  130 CONTINUE
      IF (RS1.GT.0.0D0) GO TO 120
      NZ = N
      DO 140 I=1,N
        YR(I) = ZEROR
        YI(I) = ZEROI
  140 CONTINUE
      RETURN
      END
      SUBROUTINE ZUNI2(ZR, ZI, FNU, KODE, N, YR, YI, NZ, NLAST, FNUL,
     * TOL, ELIM, ALIM)
C***BEGIN PROLOGUE  ZUNI2
C***REFER TO  ZBESI,ZBESK
C
C     ZUNI2 COMPUTES I(FNU,Z) IN THE RIGHT HALF PLANE BY MEANS OF
C     UNIFORM ASYMPTOTIC EXPANSION FOR J(FNU,ZN) WHERE ZN IS Z*I
C     OR -Z*I AND ZN IS IN THE RIGHT HALF PLANE ALSO.
C
C     FNUL IS THE SMALLEST ORDER PERMITTED FOR THE ASYMPTOTIC
C     EXPANSION. NLAST=0 MEANS ALL OF THE Y VALUES WERE SET.
C     NLAST.NE.0 IS THE NUMBER LEFT TO BE COMPUTED BY ANOTHER
C     FORMULA FOR ORDERS FNU TO FNU+NLAST-1 BECAUSE FNU+NLAST-1.LT.FNUL.
C     Y(I)=CZERO FOR I=NLAST+1,N
C
C***ROUTINES CALLED  ZAIRY,ZUCHK,ZUNHJ,ZUOIK,D1MACH,AZABS
C***END PROLOGUE  ZUNI2
C     COMPLEX AI,ARG,ASUM,BSUM,CFN,CI,CID,CIP,CONE,CRSC,CSCL,CSR,CSS,
C    *CZERO,C1,C2,DAI,PHI,RZ,S1,S2,Y,Z,ZB,ZETA1,ZETA2,ZN
      DOUBLE PRECISION AARG, AIC, AII, AIR, ALIM, ANG, APHI, ARGI,
     * ARGR, ASCLE, ASUMI, ASUMR, BRY, BSUMI, BSUMR, CIDI, CIPI, CIPR,
     * CONER, CRSC, CSCL, CSRR, CSSR, C1R, C2I, C2M, C2R, DAII,
     * DAIR, ELIM, FN, FNU, FNUL, HPI, PHII, PHIR, RAST, RAZ, RS1, RZI,
     * RZR, STI, STR, S1I, S1R, S2I, S2R, TOL, YI, YR, ZBI, ZBR, ZEROI,
     * ZEROR, ZETA1I, ZETA1R, ZETA2I, ZETA2R, ZI, ZNI, ZNR, ZR, CYR,
     * CYI, D1MACH, AZABS, CAR, SAR
      INTEGER I, IFLAG, IN, INU, J, K, KODE, N, NAI, ND, NDAI, NLAST,
     * NN, NUF, NW, NZ, IDUM
      DIMENSION BRY(3), YR(N), YI(N), CIPR(4), CIPI(4), CSSR(3),
     * CSRR(3), CYR(2), CYI(2)
      DATA ZEROR,ZEROI,CONER / 0.0D0, 0.0D0, 1.0D0 /
      DATA CIPR(1),CIPI(1),CIPR(2),CIPI(2),CIPR(3),CIPI(3),CIPR(4),
     * CIPI(4)/ 1.0D0,0.0D0, 0.0D0,1.0D0, -1.0D0,0.0D0, 0.0D0,-1.0D0/
      DATA HPI, AIC  /
     1      1.57079632679489662D+00,     1.265512123484645396D+00/
C
      NZ = 0
      ND = N
      NLAST = 0
C-----------------------------------------------------------------------
C     COMPUTED VALUES WITH EXPONENTS BETWEEN ALIM AND ELIM IN MAG-
C     NITUDE ARE SCALED TO KEEP INTERMEDIATE ARITHMETIC ON SCALE,
C     EXP(ALIM)=EXP(ELIM)*TOL
C-----------------------------------------------------------------------
      CSCL = 1.0D0/TOL
      CRSC = TOL
      CSSR(1) = CSCL
      CSSR(2) = CONER
      CSSR(3) = CRSC
      CSRR(1) = CRSC
      CSRR(2) = CONER
      CSRR(3) = CSCL
      BRY(1) = 1.0D+3*D1MACH(1)/TOL
C-----------------------------------------------------------------------
C     ZN IS IN THE RIGHT HALF PLANE AFTER ROTATION BY CI OR -CI
C-----------------------------------------------------------------------
      ZNR = ZI
      ZNI = -ZR
      ZBR = ZR
      ZBI = ZI
      CIDI = -CONER
      INU = INT(SNGL(FNU))
      ANG = HPI*(FNU-DBLE(FLOAT(INU)))
      C2R = DCOS(ANG)
      C2I = DSIN(ANG)
      CAR = C2R
      SAR = C2I
      IN = INU + N - 1
      IN = MOD(IN,4) + 1
      STR = C2R*CIPR(IN) - C2I*CIPI(IN)
      C2I = C2R*CIPI(IN) + C2I*CIPR(IN)
      C2R = STR
      IF (ZI.GT.0.0D0) GO TO 10
      ZNR = -ZNR
      ZBI = -ZBI
      CIDI = -CIDI
      C2I = -C2I
   10 CONTINUE
C-----------------------------------------------------------------------
C     CHECK FOR UNDERFLOW AND OVERFLOW ON FIRST MEMBER
C-----------------------------------------------------------------------
      FN = DMAX1(FNU,1.0D0)
      CALL ZUNHJ(ZNR, ZNI, FN, 1, TOL, PHIR, PHII, ARGR, ARGI, ZETA1R,
     * ZETA1I, ZETA2R, ZETA2I, ASUMR, ASUMI, BSUMR, BSUMI)
      IF (KODE.EQ.1) GO TO 20
      STR = ZBR + ZETA2R
      STI = ZBI + ZETA2I
      RAST = FN/AZABS(STR,STI)
      STR = STR*RAST*RAST
      STI = -STI*RAST*RAST
      S1R = -ZETA1R + STR
      S1I = -ZETA1I + STI
      GO TO 30
   20 CONTINUE
      S1R = -ZETA1R + ZETA2R
      S1I = -ZETA1I + ZETA2I
   30 CONTINUE
      RS1 = S1R
      IF (DABS(RS1).GT.ELIM) GO TO 150
   40 CONTINUE
      NN = MIN0(2,ND)
      DO 90 I=1,NN
        FN = FNU + DBLE(FLOAT(ND-I))
        CALL ZUNHJ(ZNR, ZNI, FN, 0, TOL, PHIR, PHII, ARGR, ARGI,
     *   ZETA1R, ZETA1I, ZETA2R, ZETA2I, ASUMR, ASUMI, BSUMR, BSUMI)
        IF (KODE.EQ.1) GO TO 50
        STR = ZBR + ZETA2R
        STI = ZBI + ZETA2I
        RAST = FN/AZABS(STR,STI)
        STR = STR*RAST*RAST
        STI = -STI*RAST*RAST
        S1R = -ZETA1R + STR
        S1I = -ZETA1I + STI + DABS(ZI)
        GO TO 60
   50   CONTINUE
        S1R = -ZETA1R + ZETA2R
        S1I = -ZETA1I + ZETA2I
   60   CONTINUE
C-----------------------------------------------------------------------
C     TEST FOR UNDERFLOW AND OVERFLOW
C-----------------------------------------------------------------------
        RS1 = S1R
        IF (DABS(RS1).GT.ELIM) GO TO 120
        IF (I.EQ.1) IFLAG = 2
        IF (DABS(RS1).LT.ALIM) GO TO 70
C-----------------------------------------------------------------------
C     REFINE  TEST AND SCALE
C-----------------------------------------------------------------------
C-----------------------------------------------------------------------
        APHI = AZABS(PHIR,PHII)
        AARG = AZABS(ARGR,ARGI)
        RS1 = RS1 + DLOG(APHI) - 0.25D0*DLOG(AARG) - AIC
        IF (DABS(RS1).GT.ELIM) GO TO 120
        IF (I.EQ.1) IFLAG = 1
        IF (RS1.LT.0.0D0) GO TO 70
        IF (I.EQ.1) IFLAG = 3
   70   CONTINUE
C-----------------------------------------------------------------------
C     SCALE S1 TO KEEP INTERMEDIATE ARITHMETIC ON SCALE NEAR
C     EXPONENT EXTREMES
C-----------------------------------------------------------------------
        CALL ZAIRY(ARGR, ARGI, 0, 2, AIR, AII, NAI, IDUM)
        CALL ZAIRY(ARGR, ARGI, 1, 2, DAIR, DAII, NDAI, IDUM)
        STR = DAIR*BSUMR - DAII*BSUMI
        STI = DAIR*BSUMI + DAII*BSUMR
        STR = STR + (AIR*ASUMR-AII*ASUMI)
        STI = STI + (AIR*ASUMI+AII*ASUMR)
        S2R = PHIR*STR - PHII*STI
        S2I = PHIR*STI + PHII*STR
        STR = DEXP(S1R)*CSSR(IFLAG)
        S1R = STR*DCOS(S1I)
        S1I = STR*DSIN(S1I)
        STR = S2R*S1R - S2I*S1I
        S2I = S2R*S1I + S2I*S1R
        S2R = STR
        IF (IFLAG.NE.1) GO TO 80
        CALL ZUCHK(S2R, S2I, NW, BRY(1), TOL)
        IF (NW.NE.0) GO TO 120
   80   CONTINUE
        IF (ZI.LE.0.0D0) S2I = -S2I
        STR = S2R*C2R - S2I*C2I
        S2I = S2R*C2I + S2I*C2R
        S2R = STR
        CYR(I) = S2R
        CYI(I) = S2I
        J = ND - I + 1
        YR(J) = S2R*CSRR(IFLAG)
        YI(J) = S2I*CSRR(IFLAG)
        STR = -C2I*CIDI
        C2I = C2R*CIDI
        C2R = STR
   90 CONTINUE
      IF (ND.LE.2) GO TO 110
      RAZ = 1.0D0/AZABS(ZR,ZI)
      STR = ZR*RAZ
      STI = -ZI*RAZ
      RZR = (STR+STR)*RAZ
      RZI = (STI+STI)*RAZ
      BRY(2) = 1.0D0/BRY(1)
      BRY(3) = D1MACH(2)
      S1R = CYR(1)
      S1I = CYI(1)
      S2R = CYR(2)
      S2I = CYI(2)
      C1R = CSRR(IFLAG)
      ASCLE = BRY(IFLAG)
      K = ND - 2
      FN = DBLE(FLOAT(K))
      DO 100 I=3,ND
        C2R = S2R
        C2I = S2I
        S2R = S1R + (FNU+FN)*(RZR*C2R-RZI*C2I)
        S2I = S1I + (FNU+FN)*(RZR*C2I+RZI*C2R)
        S1R = C2R
        S1I = C2I
        C2R = S2R*C1R
        C2I = S2I*C1R
        YR(K) = C2R
        YI(K) = C2I
        K = K - 1
        FN = FN - 1.0D0
        IF (IFLAG.GE.3) GO TO 100
        STR = DABS(C2R)
        STI = DABS(C2I)
        C2M = DMAX1(STR,STI)
        IF (C2M.LE.ASCLE) GO TO 100
        IFLAG = IFLAG + 1
        ASCLE = BRY(IFLAG)
        S1R = S1R*C1R
        S1I = S1I*C1R
        S2R = C2R
        S2I = C2I
        S1R = S1R*CSSR(IFLAG)
        S1I = S1I*CSSR(IFLAG)
        S2R = S2R*CSSR(IFLAG)
        S2I = S2I*CSSR(IFLAG)
        C1R = CSRR(IFLAG)
  100 CONTINUE
  110 CONTINUE
      RETURN
  120 CONTINUE
      IF (RS1.GT.0.0D0) GO TO 140
C-----------------------------------------------------------------------
C     SET UNDERFLOW AND UPDATE PARAMETERS
C-----------------------------------------------------------------------
      YR(ND) = ZEROR
      YI(ND) = ZEROI
      NZ = NZ + 1
      ND = ND - 1
      IF (ND.EQ.0) GO TO 110
      CALL ZUOIK(ZR, ZI, FNU, KODE, 1, ND, YR, YI, NUF, TOL, ELIM, ALIM)
      IF (NUF.LT.0) GO TO 140
      ND = ND - NUF
      NZ = NZ + NUF
      IF (ND.EQ.0) GO TO 110
      FN = FNU + DBLE(FLOAT(ND-1))
      IF (FN.LT.FNUL) GO TO 130
C      FN = CIDI
C      J = NUF + 1
C      K = MOD(J,4) + 1
C      S1R = CIPR(K)
C      S1I = CIPI(K)
C      IF (FN.LT.0.0D0) S1I = -S1I
C      STR = C2R*S1R - C2I*S1I
C      C2I = C2R*S1I + C2I*S1R
C      C2R = STR
      IN = INU + ND - 1
      IN = MOD(IN,4) + 1
      C2R = CAR*CIPR(IN) - SAR*CIPI(IN)
      C2I = CAR*CIPI(IN) + SAR*CIPR(IN)
      IF (ZI.LE.0.0D0) C2I = -C2I
      GO TO 40
  130 CONTINUE
      NLAST = ND
      RETURN
  140 CONTINUE
      NZ = -1
      RETURN
  150 CONTINUE
      IF (RS1.GT.0.0D0) GO TO 140
      NZ = N
      DO 160 I=1,N
        YR(I) = ZEROR
        YI(I) = ZEROI
  160 CONTINUE
      RETURN
      END
      SUBROUTINE ZUNIK(ZRR, ZRI, FNU, IKFLG, IPMTR, TOL, INIT, PHIR,
     * PHII, ZETA1R, ZETA1I, ZETA2R, ZETA2I, SUMR, SUMI, CWRKR, CWRKI)
C***BEGIN PROLOGUE  ZUNIK
C***REFER TO  ZBESI,ZBESK
C
C        ZUNIK COMPUTES PARAMETERS FOR THE UNIFORM ASYMPTOTIC
C        EXPANSIONS OF THE I AND K FUNCTIONS ON IKFLG= 1 OR 2
C        RESPECTIVELY BY
C
C        W(FNU,ZR) = PHI*EXP(ZETA)*SUM
C
C        WHERE       ZETA=-ZETA1 + ZETA2       OR
C                          ZETA1 - ZETA2
C
C        THE FIRST CALL MUST HAVE INIT=0. SUBSEQUENT CALLS WITH THE
C        SAME ZR AND FNU WILL RETURN THE I OR K FUNCTION ON IKFLG=
C        1 OR 2 WITH NO CHANGE IN INIT. CWRK IS A COMPLEX WORK
C        ARRAY. IPMTR=0 COMPUTES ALL PARAMETERS. IPMTR=1 COMPUTES PHI,
C        ZETA1,ZETA2.
C
C***ROUTINES CALLED  ZDIV,AZLOG,AZSQRT,D1MACH
C***END PROLOGUE  ZUNIK
C     COMPLEX CFN,CON,CONE,CRFN,CWRK,CZERO,PHI,S,SR,SUM,T,T2,ZETA1,
C    *ZETA2,ZN,ZR
      DOUBLE PRECISION AC, C, CON, CONEI, CONER, CRFNI, CRFNR, CWRKI,
     * CWRKR, FNU, PHII, PHIR, RFN, SI, SR, SRI, SRR, STI, STR, SUMI,
     * SUMR, TEST, TI, TOL, TR, T2I, T2R, ZEROI, ZEROR, ZETA1I, ZETA1R,
     * ZETA2I, ZETA2R, ZNI, ZNR, ZRI, ZRR, D1MACH
      INTEGER I, IDUM, IKFLG, INIT, IPMTR, J, K, L
      DIMENSION C(120), CWRKR(16), CWRKI(16), CON(2)
      DATA ZEROR,ZEROI,CONER,CONEI / 0.0D0, 0.0D0, 1.0D0, 0.0D0 /
      DATA CON(1), CON(2)  /
     1 3.98942280401432678D-01,  1.25331413731550025D+00 /
      DATA C(1), C(2), C(3), C(4), C(5), C(6), C(7), C(8), C(9), C(10),
     1     C(11), C(12), C(13), C(14), C(15), C(16), C(17), C(18),
     2     C(19), C(20), C(21), C(22), C(23), C(24)/
     3     1.00000000000000000D+00,    -2.08333333333333333D-01,
     4     1.25000000000000000D-01,     3.34201388888888889D-01,
     5    -4.01041666666666667D-01,     7.03125000000000000D-02,
     6    -1.02581259645061728D+00,     1.84646267361111111D+00,
     7    -8.91210937500000000D-01,     7.32421875000000000D-02,
     8     4.66958442342624743D+00,    -1.12070026162229938D+01,
     9     8.78912353515625000D+00,    -2.36408691406250000D+00,
     A     1.12152099609375000D-01,    -2.82120725582002449D+01,
     B     8.46362176746007346D+01,    -9.18182415432400174D+01,
     C     4.25349987453884549D+01,    -7.36879435947963170D+00,
     D     2.27108001708984375D-01,     2.12570130039217123D+02,
     E    -7.65252468141181642D+02,     1.05999045252799988D+03/
      DATA C(25), C(26), C(27), C(28), C(29), C(30), C(31), C(32),
     1     C(33), C(34), C(35), C(36), C(37), C(38), C(39), C(40),
     2     C(41), C(42), C(43), C(44), C(45), C(46), C(47), C(48)/
     3    -6.99579627376132541D+02,     2.18190511744211590D+02,
     4    -2.64914304869515555D+01,     5.72501420974731445D-01,
     5    -1.91945766231840700D+03,     8.06172218173730938D+03,
     6    -1.35865500064341374D+04,     1.16553933368645332D+04,
     7    -5.30564697861340311D+03,     1.20090291321635246D+03,
     8    -1.08090919788394656D+02,     1.72772750258445740D+00,
     9     2.02042913309661486D+04,    -9.69805983886375135D+04,
     A     1.92547001232531532D+05,    -2.03400177280415534D+05,
     B     1.22200464983017460D+05,    -4.11926549688975513D+04,
     C     7.10951430248936372D+03,    -4.93915304773088012D+02,
     D     6.07404200127348304D+00,    -2.42919187900551333D+05,
     E     1.31176361466297720D+06,    -2.99801591853810675D+06/
      DATA C(49), C(50), C(51), C(52), C(53), C(54), C(55), C(56),
     1     C(57), C(58), C(59), C(60), C(61), C(62), C(63), C(64),
     2     C(65), C(66), C(67), C(68), C(69), C(70), C(71), C(72)/
     3     3.76327129765640400D+06,    -2.81356322658653411D+06,
     4     1.26836527332162478D+06,    -3.31645172484563578D+05,
     5     4.52187689813627263D+04,    -2.49983048181120962D+03,
     6     2.43805296995560639D+01,     3.28446985307203782D+06,
     7    -1.97068191184322269D+07,     5.09526024926646422D+07,
     8    -7.41051482115326577D+07,     6.63445122747290267D+07,
     9    -3.75671766607633513D+07,     1.32887671664218183D+07,
     A    -2.78561812808645469D+06,     3.08186404612662398D+05,
     B    -1.38860897537170405D+04,     1.10017140269246738D+02,
     C    -4.93292536645099620D+07,     3.25573074185765749D+08,
     D    -9.39462359681578403D+08,     1.55359689957058006D+09,
     E    -1.62108055210833708D+09,     1.10684281682301447D+09/
      DATA C(73), C(74), C(75), C(76), C(77), C(78), C(79), C(80),
     1     C(81), C(82), C(83), C(84), C(85), C(86), C(87), C(88),
     2     C(89), C(90), C(91), C(92), C(93), C(94), C(95), C(96)/
     3    -4.95889784275030309D+08,     1.42062907797533095D+08,
     4    -2.44740627257387285D+07,     2.24376817792244943D+06,
     5    -8.40054336030240853D+04,     5.51335896122020586D+02,
     6     8.14789096118312115D+08,    -5.86648149205184723D+09,
     7     1.86882075092958249D+10,    -3.46320433881587779D+10,
     8     4.12801855797539740D+10,    -3.30265997498007231D+10,
     9     1.79542137311556001D+10,    -6.56329379261928433D+09,
     A     1.55927986487925751D+09,    -2.25105661889415278D+08,
     B     1.73951075539781645D+07,    -5.49842327572288687D+05,
     C     3.03809051092238427D+03,    -1.46792612476956167D+10,
     D     1.14498237732025810D+11,    -3.99096175224466498D+11,
     E     8.19218669548577329D+11,    -1.09837515608122331D+12/
      DATA C(97), C(98), C(99), C(100), C(101), C(102), C(103), C(104),
     1     C(105), C(106), C(107), C(108), C(109), C(110), C(111),
     2     C(112), C(113), C(114), C(115), C(116), C(117), C(118)/
     3     1.00815810686538209D+12,    -6.45364869245376503D+11,
     4     2.87900649906150589D+11,    -8.78670721780232657D+10,
     5     1.76347306068349694D+10,    -2.16716498322379509D+09,
     6     1.43157876718888981D+08,    -3.87183344257261262D+06,
     7     1.82577554742931747D+04,     2.86464035717679043D+11,
     8    -2.40629790002850396D+12,     9.10934118523989896D+12,
     9    -2.05168994109344374D+13,     3.05651255199353206D+13,
     A    -3.16670885847851584D+13,     2.33483640445818409D+13,
     B    -1.23204913055982872D+13,     4.61272578084913197D+12,
     C    -1.19655288019618160D+12,     2.05914503232410016D+11,
     D    -2.18229277575292237D+10,     1.24700929351271032D+09/
      DATA C(119), C(120)/
     1    -2.91883881222208134D+07,     1.18838426256783253D+05/
C
      IF (INIT.NE.0) GO TO 40
C-----------------------------------------------------------------------
C     INITIALIZE ALL VARIABLES
C-----------------------------------------------------------------------
      RFN = 1.0D0/FNU
C-----------------------------------------------------------------------
C     OVERFLOW TEST (ZR/FNU TOO SMALL)
C-----------------------------------------------------------------------
      TEST = D1MACH(1)*1.0D+3
      AC = FNU*TEST
      IF (DABS(ZRR).GT.AC .OR. DABS(ZRI).GT.AC) GO TO 15
      ZETA1R = 2.0D0*DABS(DLOG(TEST))+FNU
      ZETA1I = 0.0D0
      ZETA2R = FNU
      ZETA2I = 0.0D0
      PHIR = 1.0D0
      PHII = 0.0D0
      RETURN
   15 CONTINUE
      TR = ZRR*RFN
      TI = ZRI*RFN
      SR = CONER + (TR*TR-TI*TI)
      SI = CONEI + (TR*TI+TI*TR)
      CALL AZSQRT(SR, SI, SRR, SRI)
      STR = CONER + SRR
      STI = CONEI + SRI
      CALL ZDIV(STR, STI, TR, TI, ZNR, ZNI)
      CALL AZLOG(ZNR, ZNI, STR, STI, IDUM)
      ZETA1R = FNU*STR
      ZETA1I = FNU*STI
      ZETA2R = FNU*SRR
      ZETA2I = FNU*SRI
      CALL ZDIV(CONER, CONEI, SRR, SRI, TR, TI)
      SRR = TR*RFN
      SRI = TI*RFN
      CALL AZSQRT(SRR, SRI, CWRKR(16), CWRKI(16))
      PHIR = CWRKR(16)*CON(IKFLG)
      PHII = CWRKI(16)*CON(IKFLG)
      IF (IPMTR.NE.0) RETURN
      CALL ZDIV(CONER, CONEI, SR, SI, T2R, T2I)
      CWRKR(1) = CONER
      CWRKI(1) = CONEI
      CRFNR = CONER
      CRFNI = CONEI
      AC = 1.0D0
      L = 1
      DO 20 K=2,15
        SR = ZEROR
        SI = ZEROI
        DO 10 J=1,K
          L = L + 1
          STR = SR*T2R - SI*T2I + C(L)
          SI = SR*T2I + SI*T2R
          SR = STR
   10   CONTINUE
        STR = CRFNR*SRR - CRFNI*SRI
        CRFNI = CRFNR*SRI + CRFNI*SRR
        CRFNR = STR
        CWRKR(K) = CRFNR*SR - CRFNI*SI
        CWRKI(K) = CRFNR*SI + CRFNI*SR
        AC = AC*RFN
        TEST = DABS(CWRKR(K)) + DABS(CWRKI(K))
        IF (AC.LT.TOL .AND. TEST.LT.TOL) GO TO 30
   20 CONTINUE
      K = 15
   30 CONTINUE
      INIT = K
   40 CONTINUE
      IF (IKFLG.EQ.2) GO TO 60
C-----------------------------------------------------------------------
C     COMPUTE SUM FOR THE I FUNCTION
C-----------------------------------------------------------------------
      SR = ZEROR
      SI = ZEROI
      DO 50 I=1,INIT
        SR = SR + CWRKR(I)
        SI = SI + CWRKI(I)
   50 CONTINUE
      SUMR = SR
      SUMI = SI
      PHIR = CWRKR(16)*CON(1)
      PHII = CWRKI(16)*CON(1)
      RETURN
   60 CONTINUE
C-----------------------------------------------------------------------
C     COMPUTE SUM FOR THE K FUNCTION
C-----------------------------------------------------------------------
      SR = ZEROR
      SI = ZEROI
      TR = CONER
      DO 70 I=1,INIT
        SR = SR + TR*CWRKR(I)
        SI = SI + TR*CWRKI(I)
        TR = -TR
   70 CONTINUE
      SUMR = SR
      SUMI = SI
      PHIR = CWRKR(16)*CON(2)
      PHII = CWRKI(16)*CON(2)
      RETURN
      END
      SUBROUTINE ZUOIK(ZR, ZI, FNU, KODE, IKFLG, N, YR, YI, NUF, TOL,
     * ELIM, ALIM)
C***BEGIN PROLOGUE  ZUOIK
C***REFER TO  ZBESI,ZBESK,ZBESH
C
C     ZUOIK COMPUTES THE LEADING TERMS OF THE UNIFORM ASYMPTOTIC
C     EXPANSIONS FOR THE I AND K FUNCTIONS AND COMPARES THEM
C     (IN LOGARITHMIC FORM) TO ALIM AND ELIM FOR OVER AND UNDERFLOW
C     WHERE ALIM.LT.ELIM. IF THE MAGNITUDE, BASED ON THE LEADING
C     EXPONENTIAL, IS LESS THAN ALIM OR GREATER THAN -ALIM, THEN
C     THE RESULT IS ON SCALE. IF NOT, THEN A REFINED TEST USING OTHER
C     MULTIPLIERS (IN LOGARITHMIC FORM) IS MADE BASED ON ELIM. HERE
C     EXP(-ELIM)=SMALLEST MACHINE NUMBER*1.0E+3 AND EXP(-ALIM)=
C     EXP(-ELIM)/TOL
C
C     IKFLG=1 MEANS THE I SEQUENCE IS TESTED
C          =2 MEANS THE K SEQUENCE IS TESTED
C     NUF = 0 MEANS THE LAST MEMBER OF THE SEQUENCE IS ON SCALE
C         =-1 MEANS AN OVERFLOW WOULD OCCUR
C     IKFLG=1 AND NUF.GT.0 MEANS THE LAST NUF Y VALUES WERE SET TO ZERO
C             THE FIRST N-NUF VALUES MUST BE SET BY ANOTHER ROUTINE
C     IKFLG=2 AND NUF.EQ.N MEANS ALL Y VALUES WERE SET TO ZERO
C     IKFLG=2 AND 0.LT.NUF.LT.N NOT CONSIDERED. Y MUST BE SET BY
C             ANOTHER ROUTINE
C
C***ROUTINES CALLED  ZUCHK,ZUNHJ,ZUNIK,D1MACH,AZABS,AZLOG
C***END PROLOGUE  ZUOIK
C     COMPLEX ARG,ASUM,BSUM,CWRK,CZ,CZERO,PHI,SUM,Y,Z,ZB,ZETA1,ZETA2,ZN,
C    *ZR
      DOUBLE PRECISION AARG, AIC, ALIM, APHI, ARGI, ARGR, ASUMI, ASUMR,
     * ASCLE, AX, AY, BSUMI, BSUMR, CWRKI, CWRKR, CZI, CZR, ELIM, FNN,
     * FNU, GNN, GNU, PHII, PHIR, RCZ, STR, STI, SUMI, SUMR, TOL, YI,
     * YR, ZBI, ZBR, ZEROI, ZEROR, ZETA1I, ZETA1R, ZETA2I, ZETA2R, ZI,
     * ZNI, ZNR, ZR, ZRI, ZRR, D1MACH, AZABS
      INTEGER I, IDUM, IFORM, IKFLG, INIT, KODE, N, NN, NUF, NW
      DIMENSION YR(N), YI(N), CWRKR(16), CWRKI(16)
      DATA ZEROR,ZEROI / 0.0D0, 0.0D0 /
      DATA AIC / 1.265512123484645396D+00 /
      NUF = 0
      NN = N
      ZRR = ZR
      ZRI = ZI
      IF (ZR.GE.0.0D0) GO TO 10
      ZRR = -ZR
      ZRI = -ZI
   10 CONTINUE
      ZBR = ZRR
      ZBI = ZRI
      AX = DABS(ZR)*1.7321D0
      AY = DABS(ZI)
      IFORM = 1
      IF (AY.GT.AX) IFORM = 2
      GNU = DMAX1(FNU,1.0D0)
      IF (IKFLG.EQ.1) GO TO 20
      FNN = DBLE(FLOAT(NN))
      GNN = FNU + FNN - 1.0D0
      GNU = DMAX1(GNN,FNN)
   20 CONTINUE
C-----------------------------------------------------------------------
C     ONLY THE MAGNITUDE OF ARG AND PHI ARE NEEDED ALONG WITH THE
C     REAL PARTS OF ZETA1, ZETA2 AND ZB. NO ATTEMPT IS MADE TO GET
C     THE SIGN OF THE IMAGINARY PART CORRECT.
C-----------------------------------------------------------------------
      IF (IFORM.EQ.2) GO TO 30
      INIT = 0
      CALL ZUNIK(ZRR, ZRI, GNU, IKFLG, 1, TOL, INIT, PHIR, PHII,
     * ZETA1R, ZETA1I, ZETA2R, ZETA2I, SUMR, SUMI, CWRKR, CWRKI)
      CZR = -ZETA1R + ZETA2R
      CZI = -ZETA1I + ZETA2I
      GO TO 50
   30 CONTINUE
      ZNR = ZRI
      ZNI = -ZRR
      IF (ZI.GT.0.0D0) GO TO 40
      ZNR = -ZNR
   40 CONTINUE
      CALL ZUNHJ(ZNR, ZNI, GNU, 1, TOL, PHIR, PHII, ARGR, ARGI, ZETA1R,
     * ZETA1I, ZETA2R, ZETA2I, ASUMR, ASUMI, BSUMR, BSUMI)
      CZR = -ZETA1R + ZETA2R
      CZI = -ZETA1I + ZETA2I
      AARG = AZABS(ARGR,ARGI)
   50 CONTINUE
      IF (KODE.EQ.1) GO TO 60
      CZR = CZR - ZBR
      CZI = CZI - ZBI
   60 CONTINUE
      IF (IKFLG.EQ.1) GO TO 70
      CZR = -CZR
      CZI = -CZI
   70 CONTINUE
      APHI = AZABS(PHIR,PHII)
      RCZ = CZR
C-----------------------------------------------------------------------
C     OVERFLOW TEST
C-----------------------------------------------------------------------
      IF (RCZ.GT.ELIM) GO TO 210
      IF (RCZ.LT.ALIM) GO TO 80
      RCZ = RCZ + DLOG(APHI)
      IF (IFORM.EQ.2) RCZ = RCZ - 0.25D0*DLOG(AARG) - AIC
      IF (RCZ.GT.ELIM) GO TO 210
      GO TO 130
   80 CONTINUE
C-----------------------------------------------------------------------
C     UNDERFLOW TEST
C-----------------------------------------------------------------------
      IF (RCZ.LT.(-ELIM)) GO TO 90
      IF (RCZ.GT.(-ALIM)) GO TO 130
      RCZ = RCZ + DLOG(APHI)
      IF (IFORM.EQ.2) RCZ = RCZ - 0.25D0*DLOG(AARG) - AIC
      IF (RCZ.GT.(-ELIM)) GO TO 110
   90 CONTINUE
      DO 100 I=1,NN
        YR(I) = ZEROR
        YI(I) = ZEROI
  100 CONTINUE
      NUF = NN
      RETURN
  110 CONTINUE
      ASCLE = 1.0D+3*D1MACH(1)/TOL
      CALL AZLOG(PHIR, PHII, STR, STI, IDUM)
      CZR = CZR + STR
      CZI = CZI + STI
      IF (IFORM.EQ.1) GO TO 120
      CALL AZLOG(ARGR, ARGI, STR, STI, IDUM)
      CZR = CZR - 0.25D0*STR - AIC
      CZI = CZI - 0.25D0*STI
  120 CONTINUE
      AX = DEXP(RCZ)/TOL
      AY = CZI
      CZR = AX*DCOS(AY)
      CZI = AX*DSIN(AY)
      CALL ZUCHK(CZR, CZI, NW, ASCLE, TOL)
      IF (NW.NE.0) GO TO 90
  130 CONTINUE
      IF (IKFLG.EQ.2) RETURN
      IF (N.EQ.1) RETURN
C-----------------------------------------------------------------------
C     SET UNDERFLOWS ON I SEQUENCE
C-----------------------------------------------------------------------
  140 CONTINUE
      GNU = FNU + DBLE(FLOAT(NN-1))
      IF (IFORM.EQ.2) GO TO 150
      INIT = 0
      CALL ZUNIK(ZRR, ZRI, GNU, IKFLG, 1, TOL, INIT, PHIR, PHII,
     * ZETA1R, ZETA1I, ZETA2R, ZETA2I, SUMR, SUMI, CWRKR, CWRKI)
      CZR = -ZETA1R + ZETA2R
      CZI = -ZETA1I + ZETA2I
      GO TO 160
  150 CONTINUE
      CALL ZUNHJ(ZNR, ZNI, GNU, 1, TOL, PHIR, PHII, ARGR, ARGI, ZETA1R,
     * ZETA1I, ZETA2R, ZETA2I, ASUMR, ASUMI, BSUMR, BSUMI)
      CZR = -ZETA1R + ZETA2R
      CZI = -ZETA1I + ZETA2I
      AARG = AZABS(ARGR,ARGI)
  160 CONTINUE
      IF (KODE.EQ.1) GO TO 170
      CZR = CZR - ZBR
      CZI = CZI - ZBI
  170 CONTINUE
      APHI = AZABS(PHIR,PHII)
      RCZ = CZR
      IF (RCZ.LT.(-ELIM)) GO TO 180
      IF (RCZ.GT.(-ALIM)) RETURN
      RCZ = RCZ + DLOG(APHI)
      IF (IFORM.EQ.2) RCZ = RCZ - 0.25D0*DLOG(AARG) - AIC
      IF (RCZ.GT.(-ELIM)) GO TO 190
  180 CONTINUE
      YR(NN) = ZEROR
      YI(NN) = ZEROI
      NN = NN - 1
      NUF = NUF + 1
      IF (NN.EQ.0) RETURN
      GO TO 140
  190 CONTINUE
      ASCLE = 1.0D+3*D1MACH(1)/TOL
      CALL AZLOG(PHIR, PHII, STR, STI, IDUM)
      CZR = CZR + STR
      CZI = CZI + STI
      IF (IFORM.EQ.1) GO TO 200
      CALL AZLOG(ARGR, ARGI, STR, STI, IDUM)
      CZR = CZR - 0.25D0*STR - AIC
      CZI = CZI - 0.25D0*STI
  200 CONTINUE
      AX = DEXP(RCZ)/TOL
      AY = CZI
      CZR = AX*DCOS(AY)
      CZI = AX*DSIN(AY)
      CALL ZUCHK(CZR, CZI, NW, ASCLE, TOL)
      IF (NW.NE.0) GO TO 180
      RETURN
  210 CONTINUE
      NUF = -1
      RETURN
      END
      SUBROUTINE ZWRSK(ZRR, ZRI, FNU, KODE, N, YR, YI, NZ, CWR, CWI,
     * TOL, ELIM, ALIM)
C***BEGIN PROLOGUE  ZWRSK
C***REFER TO  ZBESI,ZBESK
C
C     ZWRSK COMPUTES THE I BESSEL FUNCTION FOR RE(Z).GE.0.0 BY
C     NORMALIZING THE I FUNCTION RATIOS FROM ZRATI BY THE WRONSKIAN
C
C***ROUTINES CALLED  D1MACH,ZBKNU,ZRATI,AZABS
C***END PROLOGUE  ZWRSK
C     COMPLEX CINU,CSCL,CT,CW,C1,C2,RCT,ST,Y,ZR
      DOUBLE PRECISION ACT, ACW, ALIM, ASCLE, CINUI, CINUR, CSCLR, CTI,
     * CTR, CWI, CWR, C1I, C1R, C2I, C2R, ELIM, FNU, PTI, PTR, RACT,
     * STI, STR, TOL, YI, YR, ZRI, ZRR, AZABS, D1MACH
      INTEGER I, KODE, N, NW, NZ
      DIMENSION YR(N), YI(N), CWR(2), CWI(2)
C-----------------------------------------------------------------------
C     I(FNU+I-1,Z) BY BACKWARD RECURRENCE FOR RATIOS
C     Y(I)=I(FNU+I,Z)/I(FNU+I-1,Z) FROM CRATI NORMALIZED BY THE
C     WRONSKIAN WITH K(FNU,Z) AND K(FNU+1,Z) FROM CBKNU.
C-----------------------------------------------------------------------
      NZ = 0
      CALL ZBKNU(ZRR, ZRI, FNU, KODE, 2, CWR, CWI, NW, TOL, ELIM, ALIM)
      IF (NW.NE.0) GO TO 50
      CALL ZRATI(ZRR, ZRI, FNU, N, YR, YI, TOL)
C-----------------------------------------------------------------------
C     RECUR FORWARD ON I(FNU+1,Z) = R(FNU,Z)*I(FNU,Z),
C     R(FNU+J-1,Z)=Y(J),  J=1,...,N
C-----------------------------------------------------------------------
      CINUR = 1.0D0
      CINUI = 0.0D0
      IF (KODE.EQ.1) GO TO 10
      CINUR = DCOS(ZRI)
      CINUI = DSIN(ZRI)
   10 CONTINUE
C-----------------------------------------------------------------------
C     ON LOW EXPONENT MACHINES THE K FUNCTIONS CAN BE CLOSE TO BOTH
C     THE UNDER AND OVERFLOW LIMITS AND THE NORMALIZATION MUST BE
C     SCALED TO PREVENT OVER OR UNDERFLOW. CUOIK HAS DETERMINED THAT
C     THE RESULT IS ON SCALE.
C-----------------------------------------------------------------------
      ACW = AZABS(CWR(2),CWI(2))
      ASCLE = 1.0D+3*D1MACH(1)/TOL
      CSCLR = 1.0D0
      IF (ACW.GT.ASCLE) GO TO 20
      CSCLR = 1.0D0/TOL
      GO TO 30
   20 CONTINUE
      ASCLE = 1.0D0/ASCLE
      IF (ACW.LT.ASCLE) GO TO 30
      CSCLR = TOL
   30 CONTINUE
      C1R = CWR(1)*CSCLR
      C1I = CWI(1)*CSCLR
      C2R = CWR(2)*CSCLR
      C2I = CWI(2)*CSCLR
      STR = YR(1)
      STI = YI(1)
C-----------------------------------------------------------------------
C     CINU=CINU*(CONJG(CT)/CABS(CT))*(1.0D0/CABS(CT) PREVENTS
C     UNDER- OR OVERFLOW PREMATURELY BY SQUARING CABS(CT)
C-----------------------------------------------------------------------
      PTR = STR*C1R - STI*C1I
      PTI = STR*C1I + STI*C1R
      PTR = PTR + C2R
      PTI = PTI + C2I
      CTR = ZRR*PTR - ZRI*PTI
      CTI = ZRR*PTI + ZRI*PTR
      ACT = AZABS(CTR,CTI)
      RACT = 1.0D0/ACT
      CTR = CTR*RACT
      CTI = -CTI*RACT
      PTR = CINUR*RACT
      PTI = CINUI*RACT
      CINUR = PTR*CTR - PTI*CTI
      CINUI = PTR*CTI + PTI*CTR
      YR(1) = CINUR*CSCLR
      YI(1) = CINUI*CSCLR
      IF (N.EQ.1) RETURN
      DO 40 I=2,N
        PTR = STR*CINUR - STI*CINUI
        CINUI = STR*CINUI + STI*CINUR
        CINUR = PTR
        STR = YR(I)
        STI = YI(I)
        YR(I) = CINUR*CSCLR
        YI(I) = CINUI*CSCLR
   40 CONTINUE
      RETURN
   50 CONTINUE
      NZ = -1
      IF(NW.EQ.(-2)) NZ=-2
      RETURN
      END
