Math & Science ⇒ arc over symbols

[elim]

I tried

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\frown {AB},\; \frown {ABC}

\frown {AB},\; \frown {ABC} for arc from A, B or arc determined by 3 points, but what is the proper way of tex them?

Thanks.

[Stefan Kottwitz]

It would be better if you would post a minimal working example in case of problems. \frown is not a standard command.

You could use the fourier package:

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\documentclass{article}
\usepackage{fourier}
\begin{document}
$\widearc{AB} \quad \widearc{ABC}$
\end{document}

Or the arcs package and \overarc{...}.

Stefan