DragonFly On-Line Manual Pages

PCPTTRS(l)                             )                            PCPTTRS(l)

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

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+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.

ScaLAPACK version 1.7           13 August 2001                      PCPTTRS(l)