DragonFly On-Line Manual Pages

PSPBTRS(l)                             )                            PSPBTRS(l)

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

SYNOPSIS
       SUBROUTINE PSPBTRS( 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( * )
           REAL A( * ), AF( * ), B( * ), WORK( * )

PURPOSE
       PSPBTRS 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
       produce the factors stored in A(1:N,JA:JA+N-1) and AF by PSPBTRF.
       A(1:N, JA:JA+N-1) is an N-by-N real
       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 PSPBTRF.

       Routine PSPBTRF MUST be called first.

ScaLAPACK version 1.7           13 August 2001                      PSPBTRS(l)