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csptrs(3P)		    Sun Performance Library		    csptrs(3P)

NAME
       csptrs - solve a system of linear equations A*X = B with a complex sym‐
       metric matrix A stored in packed format using  the  factorization  A  =
       U*D*U**T or A = L*D*L**T computed by CSPTRF

SYNOPSIS
       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, com‐
		 plex *b, int ldb, int *info);

       void csptrs_64(char uplo, long n, long nrhs, complex *ap, long *ipivot,
		 complex *b, long ldb, long *info);

PURPOSE
       csptrs  solves a system of linear equations A*X = B with a complex sym‐
       metric matrix A stored in packed format using  the  factorization  A  =
       U*D*U**T or A = L*D*L**T computed by CSPTRF.

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)
		 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 interchanges  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 illegal value

				  6 Mar 2009			    csptrs(3P)

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