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Man Pages


Manual Reference Pages  -  PZGBTRS (l)

NAME

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

CONTENTS

Synopsis
Purpose

SYNOPSIS

SUBROUTINE PZGBTRS( TRANS, N, BWL, BWU, NRHS, A, JA, DESCA, IPIV, B, IB, DESCB, AF, LAF, WORK, LWORK, INFO )
    CHARACTER TRANS
    INTEGER BWU, BWL, IB, INFO, JA, LAF, LWORK, N, NRHS
    INTEGER DESCA( * ), DESCB( * ), IPIV(*)
    COMPLEX*16 A( * ), AF( * ), B( * ), WORK( * )

PURPOSE

PZGBTRS solves a system of linear equations A(1:N, JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS) or
A(1:N, JA:JA+N-1)’ * X = B(IB:IB+N-1, 1:NRHS)

where 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 PZGBTRF.
A(1:N, JA:JA+N-1) is an N-by-N complex
banded distributed
matrix with bandwidth BWL, BWU.

Routine PZGBTRF MUST be called first.

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ScaLAPACK version 1.7 PZGBTRS (l) 13 August 2001

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