SUBROUTINE CPOCON( UPLO, N, A, LDA, ANORM, RCOND, WORK, WORK2, INFO) CHARACTER * 1 UPLO COMPLEX A(LDA,*), WORK(*) INTEGER N, LDA, INFO REAL ANORM, RCOND REAL WORK2(*) SUBROUTINE CPOCON_64( UPLO, N, A, LDA, ANORM, RCOND, WORK, WORK2, * INFO) CHARACTER * 1 UPLO COMPLEX A(LDA,*), WORK(*) INTEGER*8 N, LDA, INFO REAL ANORM, RCOND REAL WORK2(*)
SUBROUTINE POCON( UPLO, [N], A, [LDA], ANORM, RCOND, [WORK], [WORK2], * [INFO]) CHARACTER(LEN=1) :: UPLO COMPLEX, DIMENSION(:) :: WORK COMPLEX, DIMENSION(:,:) :: A INTEGER :: N, LDA, INFO REAL :: ANORM, RCOND REAL, DIMENSION(:) :: WORK2 SUBROUTINE POCON_64( UPLO, [N], A, [LDA], ANORM, RCOND, [WORK], * [WORK2], [INFO]) CHARACTER(LEN=1) :: UPLO COMPLEX, DIMENSION(:) :: WORK COMPLEX, DIMENSION(:,:) :: A INTEGER(8) :: N, LDA, INFO REAL :: ANORM, RCOND REAL, DIMENSION(:) :: WORK2
void cpocon(char uplo, int n, complex *a, int lda, float anorm, float *rcond, int *info);
void cpocon_64(char uplo, long n, complex *a, long lda, float anorm, float *rcond, long *info);
An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).