\documentclass{article}
\usepackage{axiom}
\begin{document}
\title{\$SPAD/src/input pollevel.input}
\author{The Axiom Team}
\maketitle
\begin{abstract}
\end{abstract}
\eject
\tableofcontents
\eject
\section{License}
<<license>>=
--Copyright The Numerical Algorithms Group Limited 1996.
@
<<*>>=
<<license>>

-- This file tests variables moving to the correct level within
-- polynomial towers.

)clear all

f(y : UP(x, POLY INT)): UP(x, POLY INT) == x * y
f(x)

)clear all

y := operator 'y

eq1 := D(y x,x,2) - x*y(x)=0
seriesSolve(eq1,y,x=0,[0,a])

eq2 := D(y x,x) - x*cos(y x) - exp(x)
seriesSolve(eq2,y,x=0,y(0) = 0)

)clear all

p : UP(x, POLY INT) := x
u := (z*x)
u * p
@
\eject
\begin{thebibliography}{99}
\bibitem{1} nothing
\end{thebibliography}
\end{document}
