DPOTRS(3F)							    DPOTRS(3F)

NAME    [Toc]    [Back]

     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

SYNOPSIS    [Toc]    [Back]

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

	 CHARACTER	UPLO

	 INTEGER	INFO, LDA, LDB,	N, NRHS

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

PURPOSE    [Toc]    [Back]

     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    [Toc]    [Back]

     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
DPOTRS(3F)							    DPOTRS(3F)

NAME    [Toc]    [Back]

     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

SYNOPSIS    [Toc]    [Back]

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

	 CHARACTER	UPLO

	 INTEGER	INFO, LDA, LDB,	N, NRHS

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

PURPOSE    [Toc]    [Back]

     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    [Toc]    [Back]

     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


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