Contents
csptrs - solve a system of linear equations A*X = B with a
complex symmetric matrix A stored in packed format using the
factorization A = U*D*U**T or A = L*D*L**T computed by
CSPTRF
SUBROUTINE CSPTRS(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)
CHARACTER * 1 UPLO
COMPLEX AP(*), B(LDB,*)
INTEGER N, NRHS, LDB, INFO
INTEGER IPIVOT(*)
SUBROUTINE CSPTRS_64(UPLO, N, NRHS, AP, IPIVOT, B, LDB, INFO)
CHARACTER * 1 UPLO
COMPLEX AP(*), B(LDB,*)
INTEGER*8 N, NRHS, LDB, INFO
INTEGER*8 IPIVOT(*)
F95 INTERFACE
SUBROUTINE SPTRS(UPLO, [N], [NRHS], AP, IPIVOT, B, [LDB], [INFO])
CHARACTER(LEN=1) :: UPLO
COMPLEX, DIMENSION(:) :: AP
COMPLEX, DIMENSION(:,:) :: B
INTEGER :: N, NRHS, LDB, INFO
INTEGER, DIMENSION(:) :: IPIVOT
SUBROUTINE SPTRS_64(UPLO, [N], [NRHS], AP, IPIVOT, B, [LDB], [INFO])
CHARACTER(LEN=1) :: UPLO
COMPLEX, DIMENSION(:) :: AP
COMPLEX, DIMENSION(:,:) :: B
INTEGER(8) :: N, NRHS, LDB, INFO
INTEGER(8), DIMENSION(:) :: IPIVOT
C INTERFACE
#include <sunperf.h>
void csptrs(char uplo, int n, int nrhs, complex *ap, int
*ipivot, complex *b, int ldb, int *info);
void csptrs_64(char uplo, long n, long nrhs, complex *ap,
long *ipivot, complex *b, long ldb, long *info);
csptrs solves a system of linear equations A*X = B with a
complex symmetric matrix A stored in packed format using the
factorization A = U*D*U**T or A = L*D*L**T computed by
CSPTRF.
UPLO (input)
Specifies whether the details of the factorization
are stored as an upper or lower triangular matrix.
= 'U': Upper triangular, 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)
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 inter-
changes and the block structure of D as determined
by CSPTRF.
B (input/output)
Complex 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 ille-
gal value