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DPPTRS(1)		 LAPACK routine (version 3.2)		     DPPTRS(1)

NAME
       DPPTRS  -  solves a system of linear equations A*X = B with a symmetric
       positive definite matrix A in packed storage using the Cholesky factor‐
       ization A = U**T*U or A = L*L**T computed by DPPTRF

SYNOPSIS
       SUBROUTINE DPPTRS( UPLO, N, NRHS, AP, B, LDB, INFO )

	   CHARACTER	  UPLO

	   INTEGER	  INFO, LDB, N, NRHS

	   DOUBLE	  PRECISION AP( * ), B( LDB, * )

PURPOSE
       DPPTRS  solves  a  system  of linear equations A*X = B with a symmetric
       positive definite matrix A in packed storage using the Cholesky factor‐
       ization A = U**T*U or A = L*L**T computed by DPPTRF.

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.

       AP      (input) DOUBLE PRECISION array, dimension (N*(N+1)/2)
	       The triangular factor U or L from the Cholesky factorization  A
	       =  U**T*U  or  A = L*L**T, packed columnwise in a linear array.
	       The j-th column of U or L is stored in the array AP as follows:
	       if  UPLO = 'U', AP(i + (j-1)*j/2) = U(i,j) for 1<=i<=j; if UPLO
	       = 'L', AP(i + (j-1)*(2n-j)/2) = L(i,j) for j<=i<=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

 LAPACK routine (version 3.2)	 November 2008			     DPPTRS(1)
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