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PCPTTRS(l) ) PCPTTRS(l)

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

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( * )

PCPTTRS 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 produce the factors stored in A(1:N,JA:JA+N-1) and AF by PCPTTRF.
 
A(1:N, JA:JA+N-1) is an N-by-N 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+N-1) = U'D *U or L*D L' as computed by PCPTTRF.
Routine PCPTTRF MUST be called first.
 
13 August 2001 ScaLAPACK version 1.7

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