cspcon - estimate the reciprocal of the condition number (in the 1-norm) of a complex symmetric packed matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by CSPTRF
SUBROUTINE CSPCON(UPLO, N, A, IPIVOT, ANORM, RCOND, WORK, INFO) CHARACTER*1 UPLO COMPLEX A(*), WORK(*) INTEGER N, INFO INTEGER IPIVOT(*) REAL ANORM, RCOND SUBROUTINE CSPCON_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 F95 INTERFACE SUBROUTINE SPCON(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 SPCON_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 C INTERFACE #include <sunperf.h> void cspcon(char uplo, int n, complex *a, int *ipivot, float anorm, float *rcond, int *info); void cspcon_64(char uplo, long n, complex *a, long *ipivot, float anorm, float *rcond, long *info);
Oracle Solaris Studio Performance Library cspcon(3P) NAME cspcon - estimate the reciprocal of the condition number (in the 1-norm) of a complex symmetric packed matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by CSPTRF SYNOPSIS SUBROUTINE CSPCON(UPLO, N, A, IPIVOT, ANORM, RCOND, WORK, INFO) CHARACTER*1 UPLO COMPLEX A(*), WORK(*) INTEGER N, INFO INTEGER IPIVOT(*) REAL ANORM, RCOND SUBROUTINE CSPCON_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 F95 INTERFACE SUBROUTINE SPCON(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 SPCON_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 C INTERFACE #include <sunperf.h> void cspcon(char uplo, int n, complex *a, int *ipivot, float anorm, float *rcond, int *info); void cspcon_64(char uplo, long n, complex *a, long *ipivot, float anorm, float *rcond, long *info); PURPOSE cspcon estimates the reciprocal of the condition number (in the 1-norm) of a complex symmetric packed matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by CSPTRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))). ARGUMENTS UPLO (input) Specifies whether the details of the factorization are stored as an upper or lower triangular matrix. = 'U': Upper trian- gular, form is A = U*D*U**T; = 'L': Lower triangular, form is A = L*D*L**T. N (input) The order of the matrix A. N >= 0. A (input) Complex array, dimension (N*(N+1)/2) The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by CSPTRF, stored as a packed triangular matrix. IPIVOT (input) Integer array, dimension (N) Details of the interchanges and the block structure of D as determined by CSPTRF. ANORM (input) The 1-norm of the original matrix A. RCOND (output) The reciprocal of the condition number of the matrix A, com- puted as RCOND = 1/(ANORM * AINVNM), where AINVNM is an esti- mate of the 1-norm of inv(A) computed in this routine. WORK (workspace) Complex array, dimension(2*N) INFO (output) = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value 7 Nov 2015 cspcon(3P)