PSPBTRSV(l) ) PSPBTRSV(l)NAME
PSPBTRSV - solve a banded triangular system of linear equations A(1:N,
JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS)
SYNOPSIS
SUBROUTINE PSPBTRSV( UPLO, TRANS, N, BW, NRHS, A, JA, DESCA, B, IB,
DESCB, AF, LAF, WORK, LWORK, INFO )
CHARACTER TRANS, UPLO
INTEGER BW, IB, INFO, JA, LAF, LWORK, N, NRHS
INTEGER DESCA( * ), DESCB( * )
REAL A( * ), AF( * ), B( * ), WORK( * )
PURPOSE
PSPBTRSV solves a banded triangular 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)^T * X = B(IB:IB+N-1, 1:NRHS)
where A(1:N, JA:JA+N-1) is a banded
triangular matrix factor produced by the
Cholesky factorization code PSPBTRF
and is stored in A(1:N,JA:JA+N-1) and AF.
The matrix stored in A(1:N, JA:JA+N-1) is either
upper or lower triangular according to UPLO,
and the choice of solving A(1:N, JA:JA+N-1) or A(1:N, JA:JA+N-1)^T is
dictated by the user by the parameter TRANS.
Routine PSPBTRF MUST be called first.
ScaLAPACK version 1.7 13 August 2001 PSPBTRSV(l)
