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RedHat 9 (Linux i386) - man page for spotrs (redhat section l)

SPOTRS(l)					)					SPOTRS(l)

NAME
       SPOTRS  -  solve  a  system of linear equations A*X = B with a symmetric positive definite
       matrix A using the Cholesky factorization A = U**T*U or A = L*L**T computed by SPOTRF

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

	   CHARACTER	  UPLO

	   INTEGER	  INFO, LDA, LDB, N, NRHS

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

PURPOSE
       SPOTRS solves a system of linear equations A*X = B  with  a  symmetric  positive  definite
       matrix A using the Cholesky factorization A = U**T*U or A = L*L**T computed by SPOTRF.

ARGUMENTS
       UPLO    (input) CHARACTER*1
	       = 'U':  Upper triangle of A is stored;
	       = 'L':  Lower triangle of A is stored.

       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) REAL array, dimension (LDA,N)
	       The triangular factor U or L from the Cholesky factorization A =  U**T*U  or  A	=
	       L*L**T, as computed by SPOTRF.

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

       B       (input/output) REAL 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 				SPOTRS(l)


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