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



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

SYNOPSIS
       SUBROUTINE PCPBTRS( UPLO, N, BW, NRHS, A, JA, DESCA, B, IB, DESCB,  AF,
                           LAF, WORK, LWORK, INFO )

           CHARACTER       UPLO

           INTEGER         BW, IB, INFO, JA, LAF, LWORK, N, NRHS

           INTEGER         DESCA( * ), DESCB( * )

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

PURPOSE
       PCPBTRS  solves  a  system  of linear equations 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 pro-
       duce the factors stored in A(1:N,JA:JA+N-1) and AF by PCPBTRF.
       A(1:N, JA:JA+N-1) is an N-by-N complex
       banded symmetric positive definite distributed
       matrix with bandwidth BW.
       Depending  on  the  value  of  UPLO, A stores either U or L in the equn
       A(1:N, JA:JA+N-1) = U'*U or L*L' as computed by PCPBTRF.

       Routine PCPBTRF MUST be called first.




ScaLAPACK routine               31 October 2017                     PCPBTRS(3)