X-Git-Url: http://gitweb.michael.orlitzky.com/?p=mjotex.git;a=blobdiff_plain;f=mjo-set.tex;fp=mjo-set.tex;h=6addd605537bcbb696e502347072613a25faa090;hp=0000000000000000000000000000000000000000;hb=83458c3f65b80a7897ced0553804b38f4872fcb6;hpb=fe30cc3cf8f9a88785d2899d00a727931377bb5d

diff --git a/mjo-set.tex b/mjo-set.tex
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+%
+% Things that fit absolutely nowhere else.
+%
+\ifx\havemjoset\undefined
+\def\havemjoset{1}
+
+
+\ifx\operatorname\undefined
+  \usepackage{amsopn}
+\fi
+
+% The cardinality of a set. The |X| notation conflicts with the
+% absolute value, and the meaning of card(X) is clear at once, so we
+% prefer the latter.
+\newcommand*{\card}[1]{ \operatorname{card} \of{{#1}} }
+
+
+\fi