

 
Manual Reference Pages  PCPTTRS (l)
NAME
PCPTTRS  solve a system of linear equations A(1:N, JA:JA+N1) * X = B(IB:IB+N1, 1:NRHS)
CONTENTS
Synopsis
Purpose
SYNOPSIS
SUBROUTINE PCPTTRS(

UPLO, N, NRHS, D, E, JA, DESCA, B, IB, DESCB,
AF, LAF, WORK, LWORK, INFO )


CHARACTER
UPLO


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


INTEGER
DESCA( * ), DESCB( * )


COMPLEX
AF( * ), B( * ), E( * ), WORK( * )


REAL
D( * )


PURPOSE
PCPTTRS solves a system of linear equations A(1:N, JA:JA+N1) * X = B(IB:IB+N1, 1:NRHS)
where A(1:N, JA:JA+N1) is the matrix used to produce the factors
stored in A(1:N,JA:JA+N1) and AF by PCPTTRF.
A(1:N, JA:JA+N1) is an NbyN complex
tridiagonal symmetric positive definite distributed
matrix.
Depending on the value of UPLO, A stores either U or L in the equn
A(1:N, JA:JA+N1) = U’D *U or L*D L’ as computed by PCPTTRF.
Routine PCPTTRF MUST be called first.
ScaLAPACK version 1.7  PCPTTRS (l)  13 August 2001 
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