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



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

SYNOPSIS
       SUBROUTINE PSDTTRS( TRANS, N, NRHS, DL, D, DU, JA, DESCA, B, IB, DESCB,
                           AF, LAF, WORK, LWORK, INFO )

           CHARACTER       TRANS

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

           INTEGER         DESCA( * ), DESCB( * )

           REAL            AF(  * ), B( * ), D( * ), DL( * ), DU( * ), WORK( *
                           )

PURPOSE
       PSDTTRS solves a 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)' * X = B(IB:IB+N-1, 1:NRHS)

       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 PSDTTRF.
       A(1:N, JA:JA+N-1) is an N-by-N real
       tridiagonal diagonally dominant-like distributed
       matrix.

       Routine PSDTTRF MUST be called first.




ScaLAPACK routine               31 October 2017                     PSDTTRS(3)