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



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

SYNOPSIS
       SUBROUTINE PDPTTRS( 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( * )

           DOUBLE          PRECISION  AF( * ), B( * ), D( * ), E( * ), WORK( *
                           )

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

       Routine PDPTTRF MUST be called first.




ScaLAPACK routine               31 October 2017                     PDPTTRS(3)