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LAPACK version 3.0
dpotrs(3)

PURPOSE
  DPOTRS - 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 DPOTRF

SYNTAX
  SUBROUTINE DPOTRS( UPLO, N, NRHS, A, LDA, B, LDB, INFO )

      CHARACTER	     UPLO

      INTEGER	     INFO, LDA, LDB, N, NRHS

      DOUBLE	     PRECISION A( LDA, * ), B( LDB, * )

DESCRIPTION
  DPOTRS 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 DPOTRF.

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) DOUBLE PRECISION 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 DPOTRF.

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

  B	  (input/output) DOUBLE PRECISION 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