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How to look up a symbol?

I am working with the font Palatino on the memoir class.

\uspackage{mathpazo}

How can I get the second C below in a mathematical formula? (the second C refers to the notion of a clique on a graph). As context, it's often used in the statical machine learning literature.

                                        enter image description here

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marked as duplicate by doncherry, Gonzalo Medina, Mike Renfro, Werner, lockstep Apr 13 '12 at 18:46

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

4  
\mathcal{C}, if I remember correctly. :) –  zeroth Apr 13 '12 at 13:49
2  
Or \mathscr{C}, in some packages. See e.g. ctan.org/tex-archive/info/symbols/comprehensive –  mbork Apr 13 '12 at 14:18
    
@doncherry I think this question is more about fonts, not looking up symbols. –  jamaicanworm Apr 13 '12 at 18:20
    
@jamaicanworm: Not really, the mathpazo package doesn't change the font of the symbol in question. If you compile \documentclass{article}\usepackage{mathpazo}\pagestyle{empty}\begin{document}$\‌​mathcal{C}$\end{document}, the only font used will be cmsy, which is Computer Modern Math Symbols. Plus you can find that very \mathcal{C} on Detexify, which is mentioned in that other question's top answer. –  doncherry Apr 13 '12 at 18:35

1 Answer 1

up vote 8 down vote accepted

As zeroth mentioned in a comment, \mathcal{C} is probably what you're looking for.

The following document compiles without errors or warnings, and ends up looking like your picture.

\documentclass{article}
\usepackage{mathpazo}
\begin{document}
\[ \prod_{C \in \mathcal{C}} \]
\end{document}

enter image description here

If you're still looking for other "script" fonts, this article suggests \mathscr{C}, from either the euscript package or the mathrsfs package.

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