\documentclass{book}

\usepackage{html,latexsym,makeidx}

%some definitions 
\newcommand{\be}{\begin{equation}}

% I'll put a comment because the use of amsmath interferes with this
%\newcommand{\ee}{\end{equation}}

\newcommand{\ba}{\begin{eqnarray}}
\newcommand{\ea}{\end{eqnarray}}

\newcommand{\C}{\mathcal}

\newcommand{\ul}{\underline}

\newcommand{\veps}{\varepsilon}
\newcommand{\vphi}{\varphi}

\newcommand{\vect}[1]{\underline{\mathcal{#1}}}

\begin{document}


\chapter{Maxwell's equations}
\input{chap1/maxwell2}

\end{document}