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DSPTRS(3F)							    DSPTRS(3F)

NAME
     DSPTRS - solve a system of linear equations A*X = B with a real symmetric
     matrix A stored in packed format using the factorization A = U*D*U**T or
     A = L*D*L**T computed by DSPTRF

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

	 CHARACTER	UPLO

	 INTEGER	INFO, LDB, N, NRHS

	 INTEGER	IPIV( * )

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

PURPOSE
     DSPTRS solves a system of linear equations A*X = B with a real symmetric
     matrix A stored in packed format using the factorization A = U*D*U**T or
     A = L*D*L**T computed by DSPTRF.

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.

     AP	     (input) DOUBLE PRECISION array, dimension (N*(N+1)/2)
	     The block diagonal matrix D and the multipliers used to obtain
	     the factor U or L as computed by DSPTRF, stored as a packed
	     triangular matrix.

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

     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).

									Page 1

DSPTRS(3F)							    DSPTRS(3F)

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

									Page 2

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