PDPTTRS(l) ) PDPTTRS(l)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 version 1.7 13 August 2001 PDPTTRS(l)
