X-Git-Url: http://gitweb.michael.orlitzky.com/?p=mjotex.git;a=blobdiff_plain;f=mjo-topology.tex;h=760d44d96c4bbead22746a24b5712faa16478efa;hp=885f3390ae0aee177391ac1584070704261ca962;hb=6759e3a5bd5fd13bd239ee851c66d1eac83a7c1b;hpb=42aadc60bddb32104aa8269f9db5e3cfe057816e

diff --git a/mjo-topology.tex b/mjo-topology.tex
index 885f339..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}
 
@@ -15,3 +19,6 @@
 
 % And the ``boundary of'' operator.
 \newcommand*{\boundary}[1]{ \operatorname{bdy}\of{{#1}} }
+
+
+\fi