% vim: :spell spelllang=fr

\renewenvironment{definition}[1]{\begin{block}{Définition~: #1.}}{\end{block}}
\renewenvironment{theorem}[1]{\begin{block}{Théorème~: #1.}}{\end{block}}
\renewenvironment{lemma}[1]{\begin{block}{Lemme~: #1.}}{\end{block}}