X-Git-Url: http://gitweb.michael.orlitzky.com/?p=mjotex.git;a=blobdiff_plain;f=mjo-algebra.tex;fp=mjo-algebra.tex;h=0b8dc93c2df8ad9da5f2b911c61eb251bc8f6b43;hp=88523456235e4bde91b99d9f99f1fcd41280588c;hb=e6bb4f9ae2d3785b331388703b8793e0409d30af;hpb=ba0227140d34fe1c8cacdb4996b5896aec4c4013

diff --git a/mjo-algebra.tex b/mjo-algebra.tex
index 8852345..0b8dc93 100644
--- a/mjo-algebra.tex
+++ b/mjo-algebra.tex
@@ -5,8 +5,9 @@
 \def\havemjoalgebra{1}
 
 
-% Needed for \operatorname.
-\usepackage{amsopn}
+\ifx\operatorname\undefined
+  \usepackage{amsopn}
+\fi
 
 % The fraction field of its argument, an integral domain. The name
 % "Frac" was chosen here instead of "Quot" because the latter