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

[mjotex.git] / mjo-common.tex

diff --git a/mjo-common.tex b/mjo-common.tex
index 6aac4ca84be42e3777562c7dd6aecd9526d1ebc0..aa7427fc96dbe46a0582a83de7c7e494e0a78f59 100644 (file)
--- a/mjo-common.tex
+++ b/mjo-common.tex
@@ -5,11 +5,13 @@
 \def\havemjocommon{1}
 
 
-% Needed for \mathbb.
-\usepackage{amsfonts}
+\ifx\mathbb\undefined
+  \usepackage{amsfonts}
+\fi
 
-% Needed for \bigtimes.
-\usepackage{mathtools}
+\ifx\bigtimes\undefined
+  \usepackage{mathtools}
+\fi
 
 % Place the argument in matching left/right parentheses.
 \newcommand*{\of}[1]{ \left({#1}\right) }