redhat man page for zsytrs

ZSYTRS(l)								 )								 ZSYTRS(l)

NAME
       ZSYTRS  - solve a system of linear equations A*X = B with a complex symmetric matrix A using the factorization A = U*D*U**T or A = L*D*L**T
       computed by ZSYTRF

SYNOPSIS
       SUBROUTINE ZSYTRS( UPLO, N, NRHS, A, LDA, IPIV, B, LDB, INFO )

	   CHARACTER	  UPLO

	   INTEGER	  INFO, LDA, LDB, N, NRHS

	   INTEGER	  IPIV( * )

	   COMPLEX*16	  A( LDA, * ), B( LDB, * )

PURPOSE
       ZSYTRS solves a system of linear equations A*X = B with a complex symmetric matrix A using the factorization A = U*D*U**T or A  =  L*D*L**T
       computed by ZSYTRF.

ARGUMENTS
       UPLO    (input) CHARACTER*1
	       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) 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*16 array, dimension (LDA,N)
	       The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ZSYTRF.

       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 ZSYTRF.

       B       (input/output) COMPLEX*16 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 							 ZSYTRS(l)