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



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

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 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 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.




ScaLAPACK routine               31 October 2017                     PSPTTRS(3)