pcpttrs(3) debian man page | unix.com

PCPTTRS(l)						   LAPACK routine (version 1.5) 						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

       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.

LAPACK version 1.5						    12 May 1997 							PCPTTRS(l)