man psdbsv (Fonctions bibliothèques) - solve a system of linear equations A(1:N, JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS)

NAME

PSDBSV - solve a system of linear equations A(1:N, JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS)

SYNOPSIS

SUBROUTINE PSDBSV(
N, BWL, BWU, NRHS, A, JA, DESCA, B, IB, DESCB, WORK, LWORK, INFO )
INTEGER BWL, BWU, IB, INFO, JA, LWORK, N, NRHS
INTEGER DESCA( * ), DESCB( * )
REAL A( * ), B( * ), WORK( * )

PURPOSE

PSDBSV solves a system of linear equations

where A(1:N, JA:JA+N-1) is an N-by-N real

banded diagonally dominant-like distributed

matrix with bandwidth BWL, BWU.

Gaussian elimination without pivoting

is used to factor a reordering

of the matrix into L U.

See PSDBTRF and PSDBTRS for details.