%
% Unnumbered versions of the mjo-theorem environments.
%
+\ifx\havemjotheoremstar\undefined
+\def\havemjotheoremstar{1}
+
\usepackage{amsthm}
\theoremstyle{plain}
\newtheorem*{corollary*}{Corollary}
+\newtheorem*{exercise*}{Exercise}
\newtheorem*{lemma*}{Lemma}
\newtheorem*{proposition*}{Proposition}
\newtheorem*{theorem*}{Theorem}
\theoremstyle{remark}
\newtheorem*{remark*}{Remark}
+
+
+\fi