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chetrs(3P)		    Sun Performance Library		    chetrs(3P)

NAME
       chetrs - solve a system of linear equations A*X = B with a complex Her‐
       mitian matrix A using the factorization A = U*D*U**H or	A  =  L*D*L**H
       computed by CHETRF

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

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

       SUBROUTINE CHETRS_64(UPLO, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO)

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

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

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

       SUBROUTINE HETRS_64(UPLO, [N], [NRHS], A, [LDA], IPIVOT, B, [LDB],
	      [INFO])

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

   C INTERFACE
       #include <sunperf.h>

       void  chetrs(char  uplo,	 int  n,  int  nrhs,  complex *a, int lda, int
		 *ipivot, complex *b, int ldb, int *info);

       void chetrs_64(char uplo, long n, long nrhs, complex *a, long lda, long
		 *ipivot, complex *b, long ldb, long *info);

PURPOSE
       chetrs  solves a system of linear equations A*X = B with a complex Her‐
       mitian matrix A using the factorization A = U*D*U**H or	A  =  L*D*L**H
       computed by CHETRF.

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) The block diagonal matrix  D  and  the	 multipliers  used  to
		 obtain the factor U or L as computed by CHETRF.

       LDA (input)
		 The leading dimension of the array A.	LDA >= max(1,N).

       IPIVOT (input)
		 Details  of  the interchanges and the block structure of D as
		 determined by CHETRF.

       B (input/output)
		 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			    chetrs(3P)

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