debian man page for pdpttrsv

PDPTTRSV(l)						   LAPACK routine (version 1.5) 					       PDPTTRSV(l)

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

SYNOPSIS
       SUBROUTINE PDPTTRSV( 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( * )

	   DOUBLE	    PRECISION AF( * ), B( * ), D( * ), E( * ), WORK( * )

PURPOSE
       PDPTTRSV solves a tridiagonal triangular system of linear equations
				      or
			   A(1:N, JA:JA+N-1)^T * X = B(IB:IB+N-1, 1:NRHS)

       where A(1:N, JA:JA+N-1) is a tridiagonal
       triangular matrix factor produced by the
       Cholesky factorization code PDPTTRF
       and is stored in A(1:N,JA:JA+N-1) and AF.
       The matrix stored in A(1:N, JA:JA+N-1) is either
       upper or lower triangular according to UPLO,
       and the choice of solving A(1:N, JA:JA+N-1) or A(1:N, JA:JA+N-1)^T is dictated by the user by the parameter TRANS.

       Routine PDPTTRF MUST be called first.

LAPACK version 1.5						    12 May 1997 						       PDPTTRSV(l)