rpl/lapack/lapack/dpstrf.f - diff

Return to dpstrf.f CVS log

Up to [local] / rpl / lapack / lapack

version 1.1, 2010/08/07 13:21:06	version 1.5, 2011/07/22 07:38:10
Line 21	Line 21
* pivoting of a real symmetric positive semidefinite matrix A.	* pivoting of a real symmetric positive semidefinite matrix A.
*	*
* The factorization has the form	* The factorization has the form
* P' * A * P = U' * U , if UPLO = 'U',	* P*T A * P = U*T U , if UPLO = 'U',
* P' * A * P = L * L', if UPLO = 'L',	* P*T A * P = L * L**T, if UPLO = 'L',
* where U is an upper triangular matrix and L is lower triangular, and	* where U is an upper triangular matrix and L is lower triangular, and
* P is stored as vector PIV.	* P is stored as vector PIV.
*	*
Line 170	Line 170
*	*
IF( UPPER ) THEN	IF( UPPER ) THEN
*	*
* Compute the Cholesky factorization P' * A * P = U' * U	* Compute the Cholesky factorization P*T A * P = U*T U
*	*
DO 140 K = 1, N, NB	DO 140 K = 1, N, NB
*	*
Line 257	Line 257
*	*
ELSE	ELSE
*	*
* Compute the Cholesky factorization P' * A * P = L * L'	* Compute the Cholesky factorization P*T A * P = L * L**T
*	*
DO 180 K = 1, N, NB	DO 180 K = 1, N, NB
*	*