PZPBTRS(l) ) PZPBTRS(l)NAME
PZPBTRS - solve a system of linear equations A(1:N, JA:JA+N-1) * X =
B(IB:IB+N-1, 1:NRHS)
SYNOPSIS
SUBROUTINE PZPBTRS( UPLO, N, BW, NRHS, A, JA, DESCA, B, IB, DESCB, AF,
LAF, WORK, LWORK, INFO )
CHARACTER UPLO
INTEGER BW, IB, INFO, JA, LAF, LWORK, N, NRHS
INTEGER DESCA( * ), DESCB( * )
COMPLEX*16 A( * ), AF( * ), B( * ), WORK( * )
PURPOSE
PZPBTRS 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 PZPBTRF.
A(1:N, JA:JA+N-1) is an N-by-N complex
banded symmetric positive definite distributed
matrix with bandwidth BW.
Depending on the value of UPLO, A stores either U or L in the equn
A(1:N, JA:JA+N-1) = U'*U or L*L' as computed by PZPBTRF.
Routine PZPBTRF MUST be called first.
ScaLAPACK version 1.7 13 August 2001 PZPBTRS(l)
