cpotrs (3p)

Name

cpotrs - solve a system of linear equations A*X = B with a Hermitian positive definite matrix A using the Cholesky factorization A = U**H*U or A = L*L**H computed by CPOTRF

Synopsis

SUBROUTINE CPOTRS(UPLO, N, NRHS, A, LDA, B, LDB, INFO)

CHARACTER*1 UPLO
COMPLEX A(LDA,*), B(LDB,*)
INTEGER N, NRHS, LDA, LDB, INFO

SUBROUTINE CPOTRS_64(UPLO, N, NRHS, A, LDA, B, LDB, INFO)

CHARACTER*1 UPLO
COMPLEX A(LDA,*), B(LDB,*)
INTEGER*8 N, NRHS, LDA, LDB, INFO




F95 INTERFACE
SUBROUTINE POTRS(UPLO, N, NRHS, A, LDA, B, LDB, INFO)

CHARACTER(LEN=1) :: UPLO
COMPLEX, DIMENSION(:,:) :: A, B
INTEGER :: N, NRHS, LDA, LDB, INFO

SUBROUTINE POTRS_64(UPLO, N, NRHS, A, LDA, B, LDB, INFO)

CHARACTER(LEN=1) :: UPLO
COMPLEX, DIMENSION(:,:) :: A, B
INTEGER(8) :: N, NRHS, LDA, LDB, INFO




C INTERFACE
#include <sunperf.h>

void  cpotrs(char  uplo,  int n, int nrhs, complex *a, int lda, complex
*b, int ldb, int *info);

void cpotrs_64(char uplo, long n, long nrhs, complex *a, long lda, com-
plex *b, long ldb, long *info);

Description

Oracle Solaris Studio Performance Library                           cpotrs(3P)



NAME
       cpotrs  -  solve  a system of linear equations A*X = B with a Hermitian
       positive definite matrix A using the Cholesky factorization A =  U**H*U
       or A = L*L**H computed by CPOTRF


SYNOPSIS
       SUBROUTINE CPOTRS(UPLO, N, NRHS, A, LDA, B, LDB, INFO)

       CHARACTER*1 UPLO
       COMPLEX A(LDA,*), B(LDB,*)
       INTEGER N, NRHS, LDA, LDB, INFO

       SUBROUTINE CPOTRS_64(UPLO, N, NRHS, A, LDA, B, LDB, INFO)

       CHARACTER*1 UPLO
       COMPLEX A(LDA,*), B(LDB,*)
       INTEGER*8 N, NRHS, LDA, LDB, INFO




   F95 INTERFACE
       SUBROUTINE POTRS(UPLO, N, NRHS, A, LDA, B, LDB, INFO)

       CHARACTER(LEN=1) :: UPLO
       COMPLEX, DIMENSION(:,:) :: A, B
       INTEGER :: N, NRHS, LDA, LDB, INFO

       SUBROUTINE POTRS_64(UPLO, N, NRHS, A, LDA, B, LDB, INFO)

       CHARACTER(LEN=1) :: UPLO
       COMPLEX, DIMENSION(:,:) :: A, B
       INTEGER(8) :: N, NRHS, LDA, LDB, INFO




   C INTERFACE
       #include <sunperf.h>

       void  cpotrs(char  uplo,  int n, int nrhs, complex *a, int lda, complex
                 *b, int ldb, int *info);

       void cpotrs_64(char uplo, long n, long nrhs, complex *a, long lda, com-
                 plex *b, long ldb, long *info);



PURPOSE
       cpotrs  solves  a  system  of linear equations A*X = B with a Hermitian
       positive definite matrix A using the Cholesky factorization A =  U**H*U
       or A = L*L**H computed by CPOTRF.


ARGUMENTS
       UPLO (input)
                 = 'U':  Upper triangle of A is stored;
                 = 'L':  Lower triangle of A is stored.


       N (input) The order of the matrix A.  N >= 0.


       NRHS (input)
                 The  number  of right hand sides, i.e., the number of columns
                 of the matrix B.  NRHS >= 0.


       A (input) The triangular factor U or L from the Cholesky  factorization
                 A = U**H*U or A = L*L**H, as computed by CPOTRF.


       LDA (input)
                 The leading dimension of the array A.  LDA >= max(1,N).


       B (input/output)
                 On  entry,  the right hand side matrix B.  On exit, the solu-
                 tion matrix X.


       LDB (input)
                 The leading dimension of the array B.  LDB >= max(1,N).


       INFO (output)
                 = 0:  successful exit
                 < 0:  if INFO = -i, the i-th argument had an illegal value




                                  7 Nov 2015                        cpotrs(3P)