## 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
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.