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CHETRS(l)			       )			     CHETRS(l)

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, IPIV, B, LDB, INFO )

	   CHARACTER	  UPLO

	   INTEGER	  INFO, LDA, LDB, N, NRHS

	   INTEGER	  IPIV( * )

	   COMPLEX	  A( LDA, * ), B( LDB, * )

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) CHARACTER*1
	       Specifies  whether  the details of the factorization are stored
	       as an upper or lower triangular matrix.	= 'U':	Upper triangu‐
	       lar, form is A = U*D*U**H;
	       = 'L':  Lower triangular, form is A = L*D*L**H.

       N       (input) INTEGER
	       The order of the matrix A.  N >= 0.

       NRHS    (input) INTEGER
	       The  number of right hand sides, i.e., the number of columns of
	       the matrix B.  NRHS >= 0.

       A       (input) COMPLEX array, dimension (LDA,N)
	       The block diagonal matrix D and the multipliers used to	obtain
	       the factor U or L as computed by CHETRF.

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

       IPIV    (input) INTEGER array, dimension (N)
	       Details	of  the	 interchanges  and the block structure of D as
	       determined by CHETRF.

       B       (input/output) COMPLEX array, dimension (LDB,NRHS)
	       On entry, the right hand side matrix B.	On exit, the  solution
	       matrix X.

       LDB     (input) INTEGER
	       The leading dimension of the array B.  LDB >= max(1,N).

       INFO    (output) INTEGER
	       = 0:  successful exit
	       < 0:  if INFO = -i, the i-th argument had an illegal value

LAPACK version 3.0		 15 June 2000			     CHETRS(l)
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