X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=mjo-topology.tex;h=760d44d96c4bbead22746a24b5712faa16478efa;hb=93c8209c75f02b41fe26c7d58dd7b8f8814051f0;hp=5f104510b7381c42782728452a77c1097d4bdddc;hpb=1997f5caa0a548beade98765fa9b679a8de26bdf;p=mjotex.git

diff --git a/mjo-topology.tex b/mjo-topology.tex
index 5f10451..760d44d 100644
--- a/mjo-topology.tex
+++ b/mjo-topology.tex
@@ -1,9 +1,13 @@
 %
 % Standard topological operations.
 %
+\ifx\havemjotopology\undefined
+\def\havemjotopology{1}
 
-% Needed for \operatorname.
-\usepackage{amsopn}
+
+\ifx\operatorname\undefined
+  \usepackage{amsopn}
+\fi
 
 \input{mjo-common}
 
@@ -11,7 +15,10 @@
 \newcommand*{\interior}[1]{ \operatorname{int}\of{{#1}} }
 
 % The ``closure of'' operator.
-\newcommand*{\closure}[1]{ \overline{{#1}} }
+\newcommand*{\closure}[1]{ \operatorname{cl}\of{{#1}} }
 
 % And the ``boundary of'' operator.
 \newcommand*{\boundary}[1]{ \operatorname{bdy}\of{{#1}} }
+
+
+\fi