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chptrs(3P)		    Sun Performance Library		    chptrs(3P)

NAME
       chptrs - solve a system of linear equations A*X = B with a complex Her‐
       mitian matrix A stored in packed format using  the  factorization  A  =
       U*D*U**H or A = L*D*L**H computed by CHPTRF

SYNOPSIS
       SUBROUTINE CHPTRS(UPLO, N, NRHS, A, IPIVOT, B, LDB, INFO)

       CHARACTER * 1 UPLO
       COMPLEX A(*), B(LDB,*)
       INTEGER N, NRHS, LDB, INFO
       INTEGER IPIVOT(*)

       SUBROUTINE CHPTRS_64(UPLO, N, NRHS, A, IPIVOT, B, LDB, INFO)

       CHARACTER * 1 UPLO
       COMPLEX A(*), B(LDB,*)
       INTEGER*8 N, NRHS, LDB, INFO
       INTEGER*8 IPIVOT(*)

   F95 INTERFACE
       SUBROUTINE HPTRS(UPLO, [N], [NRHS], A, IPIVOT, B, [LDB], [INFO])

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

       SUBROUTINE HPTRS_64(UPLO, [N], [NRHS], A, IPIVOT, B, [LDB], [INFO])

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

   C INTERFACE
       #include <sunperf.h>

       void  chptrs(char  uplo, int n, int nrhs, complex *a, int *ipivot, com‐
		 plex *b, int ldb, int *info);

       void chptrs_64(char uplo, long n, long nrhs, complex *a, long  *ipivot,
		 complex *b, long ldb, long *info);

PURPOSE
       chptrs  solves a system of linear equations A*X = B with a complex Her‐
       mitian matrix A stored in packed format using  the  factorization  A  =
       U*D*U**H or A = L*D*L**H computed by CHPTRF.

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**H;
		 = 'L':	 Lower triangular, form is A = L*D*L**H.

       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) 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 CHPTRF, 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 CHPTRF.

       B (input/output) COMPLEX array, dimension (LDB,NRHS)
		 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

				  6 Mar 2009			    chptrs(3P)

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