dsytrs_rook (3p)

Name

dsytrs_rook - solve a system of linear equations A*X = B with a real symmetric matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by DSYTRF_ROOK

Synopsis

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

CHARACTER*1 UPLO
INTEGER N, NRHS, LDA, LDB, INFO
INTEGER IPIV(*)
DOUBLE PRECISION A(LDA,*), B(LDB,*)

SUBROUTINE DSYTRS_ROOK_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, INFO)

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




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

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

SUBROUTINE SYTRS_ROOK_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, INFO)

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




C INTERFACE
#include <sunperf.h>

void  dsytrs_rook(char  uplo,  int n, int nrhs, double *a, int lda, int
*ipiv, double *b, int ldb, int *info);

void dsytrs_rook_64(char uplo, long n, long nrhs, double *a, long  lda,
long *ipiv, double *b, long ldb, long *info);

Description

Oracle Solaris Studio Performance Library                      dsytrs_rook(3P)



NAME
       dsytrs_rook  -  solve  a system of linear equations A*X = B with a real
       symmetric matrix A using the factorization A = U*D*U**T or A = L*D*L**T
       computed by DSYTRF_ROOK


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

       CHARACTER*1 UPLO
       INTEGER N, NRHS, LDA, LDB, INFO
       INTEGER IPIV(*)
       DOUBLE PRECISION A(LDA,*), B(LDB,*)

       SUBROUTINE DSYTRS_ROOK_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, INFO)

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




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

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

       SUBROUTINE SYTRS_ROOK_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, INFO)

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




   C INTERFACE
       #include <sunperf.h>

       void  dsytrs_rook(char  uplo,  int n, int nrhs, double *a, int lda, int
                 *ipiv, double *b, int ldb, int *info);

       void dsytrs_rook_64(char uplo, long n, long nrhs, double *a, long  lda,
                 long *ipiv, double *b, long ldb, long *info);



PURPOSE
       dsytrs_rook  solves  a  system  of linear equations A*X = B with a real
       symmetric matrix A using the factorization A = U*D*U**T or A = L*D*L**T
       computed by DSYTRF_ROOK.


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.


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


       A (input) The block diagonal matrix  D  and  the  multipliers  used  to
                 obtain the factor U or L as computed by DSYTRF_ROOK.


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


       IPIV (input)
                 Details  of  the interchanges and the block structure of D as
                 determined by DSYTRF_ROOK.


       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                   dsytrs_rook(3P)