%
% Standard topological operations.
%
+\ifx\havemjotopology\undefined
+\def\havemjotopology{1}
-% Needed for \operatorname.
-\usepackage{amsopn}
+
+\ifx\operatorname\undefined
+ \usepackage{amsopn}
+\fi
\input{mjo-common}
% And the ``boundary of'' operator.
\newcommand*{\boundary}[1]{ \operatorname{bdy}\of{{#1}} }
+
+
+\fi