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What LaTeX markup would one have to write to produce a result similar to the image below?

enter image description here

Please excuse my Paint-and-mouse drawing skills. :-)

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2 Answers 2

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amsmath's \text can help to obtain the correct size of superscript/subscript fonts in math mode, while the bracing it possible using the traditional \overbrace/\underbrace:

enter image description here

\documentclass{article}
\usepackage{amsmath}% http://ctan.org/pkg/amsmath
\begin{document}
$\overbrace{a\rightarrow\underbrace{(b\rightarrow c)}_{\text{bar}}}^{\text{foo}}$
\end{document}

For other symbols (like arrows), see the Comprehensive LaTeX Symbol List.

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  • Ok that was a fast and (so far) perfect answer. Thanks a lot! :-) Commented Oct 28, 2012 at 1:11
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While Werner's solution is compact and precise, this one shows other possibilities.

\documentclass{article}
\usepackage{amsmath}
\begin{document}
  \[
  \overset{\text{foo}}{\overbrace{a\rightarrow \underset{\text{bar}}{\underbrace{(b \rightarrow c)}}}}
  \]
\end{document}

enter image description here

However, I would go Werner's way if I have to do this :-). (This answer is for having some fun).

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