SYNOPSIS

SUBROUTINE PSPTTRS(

N, NRHS, D, E, JA, DESCA, B, IB, DESCB, AF, LAF, WORK, LWORK, INFO )

    

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

    

INTEGER DESCA( * ), DESCB( * )

    

REAL AF( * ), B( * ), D( * ), E( * ), WORK( * )

PURPOSE

PSPTTRS 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 PSPTTRF.
A(1:N, JA:JA+N-1) is an N-by-N real
tridiagonal symmetric positive definite distributed
matrix.

Routine PSPTTRF MUST be called first.