\documentclass[12pt,a4paper]{report}

\usepackage{mystyle}

\title{Homology of $\omega$-categories}
\author{Léonard Guetta}
\begin{document}

\maketitle

\include{omegacat}
\include{homtheo}
\bibliographystyle{alpha}
\bibliography{memoire}
\end{document}