pddttrs(3)

NAME

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

SYNOPSIS

SUBROUTINE PDDTTRS( 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( * )
    DOUBLE          PRECISION  AF(  * ), B( * ), D( * ), DL( * ), DU( *
                    ), WORK( * )

PURPOSE

PDDTTRS solves a system of linear equations

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

Routine PDDTTRF MUST be called first.

LAPACK version 1.5 12 May 1997 PDDTTRS(l)