Put \ifx guards on most other package includes, too.

[mjotex.git] / mjo-topology.tex

diff --git a/mjo-topology.tex b/mjo-topology.tex
index c7f50373ad8e98320f25088b2644e72828c1195b..760d44d96c4bbead22746a24b5712faa16478efa 100644 (file)
--- a/mjo-topology.tex
+++ b/mjo-topology.tex
@@ -5,8 +5,9 @@
 \def\havemjotopology{1}
 
 
-% Needed for \operatorname.
-\usepackage{amsopn}
+\ifx\operatorname\undefined
+  \usepackage{amsopn}
+\fi
 
 \input{mjo-common}