zgecon - estimate the reciprocal of the condition number of a general complex matrix A, in either the 1-norm or the infinity-norm, using the LU factorization computed by ZGETRF
SUBROUTINE ZGECON(NORM, N, A, LDA, ANORM, RCOND, WORK, WORK2, INFO) CHARACTER*1 NORM DOUBLE COMPLEX A(LDA,*), WORK(*) INTEGER N, LDA, INFO DOUBLE PRECISION ANORM, RCOND DOUBLE PRECISION WORK2(*) SUBROUTINE ZGECON_64(NORM, N, A, LDA, ANORM, RCOND, WORK, WORK2, INFO) CHARACTER*1 NORM DOUBLE COMPLEX A(LDA,*), WORK(*) INTEGER*8 N, LDA, INFO DOUBLE PRECISION ANORM, RCOND DOUBLE PRECISION WORK2(*) F95 INTERFACE SUBROUTINE GECON(NORM, N, A, LDA, ANORM, RCOND, WORK, WORK2, INFO) CHARACTER(LEN=1) :: NORM COMPLEX(8), DIMENSION(:) :: WORK COMPLEX(8), DIMENSION(:,:) :: A INTEGER :: N, LDA, INFO REAL(8) :: ANORM, RCOND REAL(8), DIMENSION(:) :: WORK2 SUBROUTINE GECON_64(NORM, N, A, LDA, ANORM, RCOND, WORK, WORK2, INFO) CHARACTER(LEN=1) :: NORM COMPLEX(8), DIMENSION(:) :: WORK COMPLEX(8), DIMENSION(:,:) :: A INTEGER(8) :: N, LDA, INFO REAL(8) :: ANORM, RCOND REAL(8), DIMENSION(:) :: WORK2 C INTERFACE #include <sunperf.h> void zgecon(char norm, int n, doublecomplex *a, int lda, double anorm, double *rcond, int *info); void zgecon_64(char norm, long n, doublecomplex *a, long lda, double anorm, double *rcond, long *info);
Oracle Solaris Studio Performance Library zgecon(3P) NAME zgecon - estimate the reciprocal of the condition number of a general complex matrix A, in either the 1-norm or the infinity-norm, using the LU factorization computed by ZGETRF SYNOPSIS SUBROUTINE ZGECON(NORM, N, A, LDA, ANORM, RCOND, WORK, WORK2, INFO) CHARACTER*1 NORM DOUBLE COMPLEX A(LDA,*), WORK(*) INTEGER N, LDA, INFO DOUBLE PRECISION ANORM, RCOND DOUBLE PRECISION WORK2(*) SUBROUTINE ZGECON_64(NORM, N, A, LDA, ANORM, RCOND, WORK, WORK2, INFO) CHARACTER*1 NORM DOUBLE COMPLEX A(LDA,*), WORK(*) INTEGER*8 N, LDA, INFO DOUBLE PRECISION ANORM, RCOND DOUBLE PRECISION WORK2(*) F95 INTERFACE SUBROUTINE GECON(NORM, N, A, LDA, ANORM, RCOND, WORK, WORK2, INFO) CHARACTER(LEN=1) :: NORM COMPLEX(8), DIMENSION(:) :: WORK COMPLEX(8), DIMENSION(:,:) :: A INTEGER :: N, LDA, INFO REAL(8) :: ANORM, RCOND REAL(8), DIMENSION(:) :: WORK2 SUBROUTINE GECON_64(NORM, N, A, LDA, ANORM, RCOND, WORK, WORK2, INFO) CHARACTER(LEN=1) :: NORM COMPLEX(8), DIMENSION(:) :: WORK COMPLEX(8), DIMENSION(:,:) :: A INTEGER(8) :: N, LDA, INFO REAL(8) :: ANORM, RCOND REAL(8), DIMENSION(:) :: WORK2 C INTERFACE #include <sunperf.h> void zgecon(char norm, int n, doublecomplex *a, int lda, double anorm, double *rcond, int *info); void zgecon_64(char norm, long n, doublecomplex *a, long lda, double anorm, double *rcond, long *info); PURPOSE zgecon estimates the reciprocal of the condition number of a general complex matrix A, in either the 1-norm or the infinity-norm, using the LU factorization computed by ZGETRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / ( norm(A) * norm(inv(A)) ). ARGUMENTS NORM (input) Specifies whether the 1-norm condition number or the infin- ity-norm condition number is required: = '1' or 'O': 1-norm; = 'I': Infinity-norm. N (input) The order of the matrix A. N >= 0. A (input) The factors L and U from the factorization A = P*L*U as com- puted by ZGETRF. LDA (input) The leading dimension of the array A. LDA >= max(1,N). ANORM (input) If NORM = '1' or 'O', the 1-norm of the original matrix A. If NORM = 'I', the infinity-norm of the original matrix A. RCOND (output) The reciprocal of the condition number of the matrix A, com- puted as RCOND = 1/(norm(A) * norm(inv(A))). WORK (workspace) dimension(2*N) WORK2 (workspace) dimension(2*N) INFO (output) = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value 7 Nov 2015 zgecon(3P)