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#### 16.2.4 Calligraphic

Synopsis:

\mathcal{uppercase-letters}


Use a script-like font.

In this example the graph identifier is output in a cursive font.

Let the graph be $$\mathcal{G}$$.


If you use something other than an uppercase letter then you do not get an error but you also do not get math calligraphic output. For instance, \mathcal{g} outputs a close curly brace symbol.