# Nested expressions in equations

Is it possible to type something like this (in math mode):

A = B

and put something below the = sign (such as x\rightarrow\something)?

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 Please don't forget to also up-vote the answers you accept (as well as other good answers). – Martin Scharrer♦ Apr 4 '11 at 21:54

You can use \underset from the amsmath package:

\documentclass{article}
\usepackage{amsmath}

\begin{document}

$A\underset{x\to a}{=} B$

\end{document}


I am not sure if I understood your intent correctly, though.

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