pdgbsv (3)

Solve a system of linear equations a(1:n, ja:ja+n-1) * x = b(ib:ib+n-1, 1:nrhs)

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  1. Carta.tech
  2. Packages
  3. scalapack-doc
  4. pdgbsv: Solve a system of linear equations a(1:n, ja:ja+n-1) * x = b(ib:ib+n-1, 1:nrhs)

SYNOPSIS

SUBROUTINE PDGBSV(

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( * )

DOUBLE

PRECISION A( * ), B( * ), WORK( * )

PURPOSE

PDGBSV solves a system of linear equations

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

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 PDGBTRF and PDGBTRS for details.