dsptrs
dsptrs - solve a system of linear equations A*X = B with a real symmetric matrix A stored in packed format using the factorization A = U*D*U**T or A = L*D*L**T computed by SSPTRF
SUBROUTINE DSPTRS( UPLO, N, NRHS, A, IPIVOT, B, LDB, INFO)
CHARACTER * 1 UPLO
INTEGER N, NRHS, LDB, INFO
INTEGER IPIVOT(*)
DOUBLE PRECISION A(*), B(LDB,*)
SUBROUTINE DSPTRS_64( UPLO, N, NRHS, A, IPIVOT, B, LDB, INFO)
CHARACTER * 1 UPLO
INTEGER*8 N, NRHS, LDB, INFO
INTEGER*8 IPIVOT(*)
DOUBLE PRECISION A(*), B(LDB,*)
SUBROUTINE SPTRS( UPLO, N, NRHS, A, IPIVOT, B, [LDB], [INFO])
CHARACTER(LEN=1) :: UPLO
INTEGER :: N, NRHS, LDB, INFO
INTEGER, DIMENSION(:) :: IPIVOT
REAL(8), DIMENSION(:) :: A
REAL(8), DIMENSION(:,:) :: B
SUBROUTINE SPTRS_64( UPLO, N, NRHS, A, IPIVOT, B, [LDB], [INFO])
CHARACTER(LEN=1) :: UPLO
INTEGER(8) :: N, NRHS, LDB, INFO
INTEGER(8), DIMENSION(:) :: IPIVOT
REAL(8), DIMENSION(:) :: A
REAL(8), DIMENSION(:,:) :: B
#include <sunperf.h>
void dsptrs(char uplo, int n, int nrhs, double *a, int *ipivot, double *b, int ldb, int *info);
void dsptrs_64(char uplo, long n, long nrhs, double *a, long *ipivot, double *b, long ldb, long *info);
dsptrs solves a system of linear equations A*X = B with a real
symmetric matrix A stored in packed format using the factorization
A = U*D*U**T or A = L*D*L**T computed by SSPTRF.
-
* UPLO (input)
-
Specifies whether the details of the factorization are stored
as an upper or lower triangular matrix.
-
* 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 SSPTRF, stored as a
packed triangular matrix.
-
* IPIVOT (input)
-
Details of the interchanges and the block structure of D
as determined by SSPTRF.
-
* B (input/output)
-
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)
-