111 SUBROUTINE sspt01( UPLO, N, A, AFAC, IPIV, C, LDC, RWORK, RESID )
125 REAL a( * ), afac( * ), c( ldc, * ), rwork( * )
132 parameter( zero = 0.0e+0, one = 1.0e+0 )
135 INTEGER i, info,
j, jc
161 anorm =
slansp(
'1', uplo, n, a, rwork )
165 CALL
slaset(
'Full', n, n, zero, one, c, ldc )
169 CALL
slavsp( uplo,
'Transpose',
'Non-unit', n, n, afac, ipiv, c,
174 CALL
slavsp( uplo,
'No transpose',
'Unit', n, n, afac, ipiv, c,
179 IF(
lsame( uplo,
'U' ) )
THEN
183 c( i,
j ) = c( i,
j ) - a( jc+i )
191 c( i,
j ) = c( i,
j ) - a( jc+i-
j )
199 resid =
slansy(
'1', uplo, n, c, ldc, rwork )
201 IF( anorm.LE.zero )
THEN
205 resid = ( ( resid /
REAL( N ) ) / anorm ) / eps
subroutine slaset(UPLO, M, N, ALPHA, BETA, A, LDA)
SLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values...
REAL function slansy(NORM, UPLO, N, A, LDA, WORK)
SLANSY returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real symmetric matrix.
REAL function slansp(NORM, UPLO, N, AP, WORK)
SLANSP returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a symmetric matrix supplied in packed form.
LOGICAL function lsame(CA, CB)
LSAME
REAL function slamch(CMACH)
SLAMCH
subroutine sspt01(UPLO, N, A, AFAC, IPIV, C, LDC, RWORK, RESID)
SSPT01
set ue cd $ADTTMP cat<< EOF > tmp f Program LinearEquations Implicit none Real j
subroutine slavsp(UPLO, TRANS, DIAG, N, NRHS, A, IPIV, B, LDB, INFO)
SLAVSP