2 % Things that fit absolutely nowhere else.
4 \ifx\havemjoset\undefined
7 \input{mjo-font
} % amsfonts and \mathpzc
9 \ifx\operatorname\undefined
13 % The cardinality of a set. The |X| notation conflicts with the
14 % absolute value, and the meaning of card(X) is clear at once, so we
16 \newcommand*
{\card}[1]{ \operatorname{card
}\of{{#1}} }
19 \newcommand*
{\powerset}[1]{\mathpzc{P
}\of{{#1}}}
20 \ifdefined\newglossaryentry
21 \newglossaryentry{powerset
}{
22 name=
{\ensuremath{\powerset{X
}}},
23 description=
{the ``powerset,'' or set of all subsets of $X$
},