127 SUBROUTINE zsyt02( UPLO, N, NRHS, A, LDA, X, LDX, B, LDB, RWORK,
137 INTEGER lda, ldb, ldx, n, nrhs
138 DOUBLE PRECISION resid
141 DOUBLE PRECISION rwork( * )
142 COMPLEX*16 a( lda, * ),
b( ldb, * ),
x( ldx, * )
148 DOUBLE PRECISION zero, one
149 parameter( zero = 0.0d+0, one = 1.0d+0 )
151 parameter( cone = ( 1.0d+0, 0.0d+0 ) )
155 DOUBLE PRECISION anorm, bnorm, eps, xnorm
171 IF( n.LE.0 .OR. nrhs.LE.0 )
THEN
179 anorm =
zlansy(
'1', uplo, n, a, lda, rwork )
180 IF( anorm.LE.zero )
THEN
187 CALL
zsymm(
'Left', uplo, n, nrhs, -cone, a, lda,
x, ldx, cone,
b,
197 IF( xnorm.LE.zero )
THEN
200 resid = max( resid, ( ( bnorm / anorm ) / xnorm ) / eps )
subroutine zsyt02(UPLO, N, NRHS, A, LDA, X, LDX, B, LDB, RWORK, RESID)
ZSYT02
DOUBLE PRECISION function dzasum(N, ZX, INCX)
DZASUM
set ue cd $ADTTMP cat<< EOF > tmp f Program LinearEquations Implicit none Real b(3) integer i
DOUBLE PRECISION function zlansy(NORM, UPLO, N, A, LDA, WORK)
ZLANSY returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a complex symmetric matrix.
subroutine zsymm(SIDE, UPLO, M, N, ALPHA, A, LDA, B, LDB, BETA, C, LDC)
ZSYMM
set ue cd $ADTTMP cat<< EOF > tmp f Program LinearEquations Implicit none Real j
DOUBLE PRECISION function dlamch(CMACH)
DLAMCH