man pspbsv (Fonctions bibliothèques) - solve a system of linear equations A(1:N, JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS)
NAME
PSPBSV - solve a system of linear equations A(1:N, JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS)
SYNOPSIS
- SUBROUTINE PSPBSV(
- UPLO, N, BW, NRHS, A, JA, DESCA, B, IB, DESCB, WORK, LWORK, INFO )
- CHARACTER UPLO
- INTEGER BW, IB, INFO, JA, LWORK, N, NRHS
- INTEGER DESCA( * ), DESCB( * )
- REAL A( * ), B( * ), WORK( * )
PURPOSE
PSPBSV solves a system of linear equations
where A(1:N, JA:JA+N-1) is an N-by-N real
banded symmetric positive definite distributed
matrix with bandwidth BW.
Cholesky factorization is used to factor a reordering of
the matrix into L L'.
See PSPBTRF and PSPBTRS for details.