% Numerical Mathematics and Computing, Fifth Edition
% Ward Cheney & David Kincaid
% Brooks/Cole Publ. Co.
% (c) 2004
%
% file: pdexlpde.m
% 
% PDE
%
function [c,f,s] = pdexlpde(x,t,u,DuDx)
     c = 1;
     f = DuDx;
     s = 0;
