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

NAME

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

SYNOPSIS

SUBROUTINE PCGBSV(
N, BWL, BWU, NRHS, A, JA, DESCA, IPIV, B, IB, DESCB, WORK, LWORK, INFO )
INTEGER BWL, BWU, IB, INFO, JA, LWORK, N, NRHS
INTEGER DESCA( * ), DESCB( * ), IPIV( * )
COMPLEX A( * ), B( * ), WORK( * )

PURPOSE

PCGBSV solves a system of linear equations

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

banded distributed

matrix with bandwidth BWL, BWU.

Gaussian elimination with pivoting

is used to factor a reordering

of the matrix into P L U.

See PCGBTRF and PCGBTRS for details.