chpcon - estimate the reciprocal of the condition number of a complex Hermitian packed matrix A using the factorization A = U*D*U**H or A = L*D*L**H computed by CHPTRF
SUBROUTINE CHPCON( UPLO, N, A, IPIVOT, ANORM, RCOND, WORK, INFO) CHARACTER * 1 UPLO COMPLEX A(*), WORK(*) INTEGER N, INFO INTEGER IPIVOT(*) REAL ANORM, RCOND
SUBROUTINE CHPCON_64( UPLO, N, A, IPIVOT, ANORM, RCOND, WORK, INFO) CHARACTER * 1 UPLO COMPLEX A(*), WORK(*) INTEGER*8 N, INFO INTEGER*8 IPIVOT(*) REAL ANORM, RCOND
SUBROUTINE HPCON( UPLO, [N], A, IPIVOT, ANORM, RCOND, [WORK], [INFO]) CHARACTER(LEN=1) :: UPLO COMPLEX, DIMENSION(:) :: A, WORK INTEGER :: N, INFO INTEGER, DIMENSION(:) :: IPIVOT REAL :: ANORM, RCOND
SUBROUTINE HPCON_64( UPLO, [N], A, IPIVOT, ANORM, RCOND, [WORK], * [INFO]) CHARACTER(LEN=1) :: UPLO COMPLEX, DIMENSION(:) :: A, WORK INTEGER(8) :: N, INFO INTEGER(8), DIMENSION(:) :: IPIVOT REAL :: ANORM, RCOND
#include <sunperf.h>
void chpcon(char uplo, int n, complex *a, int *ipivot, float anorm, float *rcond, int *info);
void chpcon_64(char uplo, long n, complex *a, long *ipivot, float anorm, float *rcond, long *info);
chpcon estimates the reciprocal of the condition number of a complex Hermitian packed matrix A using the factorization A = U*D*U**H or A = L*D*L**H computed by CHPTRF.
An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).
= 'L': Lower triangular, form is A = L*D*L**H.
inv(A)
computed in this routine.
dimension(2*N)
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value