ssptrs (3p)

Name

ssptrs - ric matrix A stored in packed format using the factorization A = U*D*U**T or A = L*D*L**T computed by SSPTRF

Synopsis

SUBROUTINE SSPTRS(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)

CHARACTER*1 UPLO
INTEGER N, NRHS, LDB, INFO
INTEGER IPIVOT(*)
REAL AP(*), B(LDB,*)

SUBROUTINE SSPTRS_64(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)

CHARACTER*1 UPLO
INTEGER*8 N, NRHS, LDB, INFO
INTEGER*8 IPIVOT(*)
REAL AP(*), B(LDB,*)




F95 INTERFACE
SUBROUTINE SPTRS(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)

CHARACTER(LEN=1) :: UPLO
INTEGER :: N, NRHS, LDB, INFO
INTEGER, DIMENSION(:) :: IPIVOT
REAL, DIMENSION(:) :: AP
REAL, DIMENSION(:,:) :: B

SUBROUTINE SPTRS_64(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)

CHARACTER(LEN=1) :: UPLO
INTEGER(8) :: N, NRHS, LDB, INFO
INTEGER(8), DIMENSION(:) :: IPIVOT
REAL, DIMENSION(:) :: AP
REAL, DIMENSION(:,:) :: B




C INTERFACE
#include <sunperf.h>

void  ssptrs(char  uplo, int n, int nrhs, float *ap, int *ipivot, float
*b, int ldb, int *info);

void ssptrs_64(char uplo, long n, long nrhs, float *ap,  long  *ipivot,
float *b, long ldb, long *info);

Description

Oracle Solaris Studio Performance Library                           ssptrs(3P)



NAME
       ssptrs - solve a system of linear equations A*X = B with a real symmet-
       ric matrix A stored in  packed  format  using  the  factorization  A  =
       U*D*U**T or A = L*D*L**T computed by SSPTRF


SYNOPSIS
       SUBROUTINE SSPTRS(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)

       CHARACTER*1 UPLO
       INTEGER N, NRHS, LDB, INFO
       INTEGER IPIVOT(*)
       REAL AP(*), B(LDB,*)

       SUBROUTINE SSPTRS_64(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)

       CHARACTER*1 UPLO
       INTEGER*8 N, NRHS, LDB, INFO
       INTEGER*8 IPIVOT(*)
       REAL AP(*), B(LDB,*)




   F95 INTERFACE
       SUBROUTINE SPTRS(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)

       CHARACTER(LEN=1) :: UPLO
       INTEGER :: N, NRHS, LDB, INFO
       INTEGER, DIMENSION(:) :: IPIVOT
       REAL, DIMENSION(:) :: AP
       REAL, DIMENSION(:,:) :: B

       SUBROUTINE SPTRS_64(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)

       CHARACTER(LEN=1) :: UPLO
       INTEGER(8) :: N, NRHS, LDB, INFO
       INTEGER(8), DIMENSION(:) :: IPIVOT
       REAL, DIMENSION(:) :: AP
       REAL, DIMENSION(:,:) :: B




   C INTERFACE
       #include <sunperf.h>

       void  ssptrs(char  uplo, int n, int nrhs, float *ap, int *ipivot, float
                 *b, int ldb, int *info);

       void ssptrs_64(char uplo, long n, long nrhs, float *ap,  long  *ipivot,
                 float *b, long ldb, long *info);



PURPOSE
       ssptrs  solves a system of linear equations A*X = B with a real symmet-
       ric matrix A stored in  packed  format  using  the  factorization  A  =
       U*D*U**T or A = L*D*L**T computed by SSPTRF.


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.


       AP (input)
                 Real array, dimension (N*(N+1)/2) The block diagonal matrix D
                 and  the multipliers used to obtain the factor U or L as com-
                 puted by SSPTRF, 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 SSPTRF.


       B (input/output)
                 Real  array,  dimension  (LDB, NRHS) On entry, the right hand
                 side matrix B.  On exit, the solution 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                        ssptrs(3P)