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pzpttrs
Langue: en
Version: 274750 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
PZPTTRS - solve a system of linear equations A(1:N, JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS)SYNOPSIS
- SUBROUTINE PZPTTRS(
- UPLO, N, NRHS, D, E, JA, DESCA, B, IB, DESCB, AF, LAF, WORK, LWORK, INFO )
- CHARACTER UPLO
- INTEGER IB, INFO, JA, LAF, LWORK, N, NRHS
- INTEGER DESCA( * ), DESCB( * )
- COMPLEX*16 AF( * ), B( * ), E( * ), WORK( * )
- DOUBLE PRECISION D( * )
PURPOSE
PZPTTRS solves a system of linear equationswhere A(1:N, JA:JA+N-1) is the matrix used to produce the factors stored in A(1:N,JA:JA+N-1) and AF by PZPTTRF.
A(1:N, JA:JA+N-1) is an N-by-N complex
tridiagonal symmetric positive definite distributed
matrix.
Depending on the value of UPLO, A stores either U or L in the equn A(1:N, JA:JA+N-1) = U'D *U or L*D L' as computed by PZPTTRF.
Routine PZPTTRF MUST be called first.
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre