PSGBTRS(3)    ScaLAPACK routine of NEC Numeric Library Collection   PSGBTRS(3)



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

SYNOPSIS
       SUBROUTINE PSGBTRS( TRANS, N, BWL, BWU, NRHS, A, JA,  DESCA,  IPIV,  B,
                           IB, DESCB, AF, LAF, WORK, LWORK, INFO )

           CHARACTER       TRANS

           INTEGER         BWL, BWU, IB, INFO, JA, LAF, LWORK, N, NRHS

           INTEGER         DESCA( * ), DESCB( * ), IPIV( * )

           REAL            A( * ), AF( * ), B( * ), WORK( * )

PURPOSE
       PSGBTRS  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 PSGBTRF.
       A(1:N, JA:JA+N-1) is an N-by-N real
       banded distributed
       matrix with bandwidth BWL, BWU.

       Routine PSGBTRF MUST be called first.




ScaLAPACK routine               31 October 2017                     PSGBTRS(3)