Why 'displaystyle' is not working?

Question

I am typing some mathematical expression related to 'displaystyle'. This is working well for $\displaystyle\sum_{i=1}^nx_i=1$ . But it is not working in the following example :

\documentclass[10pt]{article}
\usepackage{amsmath}

\begin{document}
$P \displaystyle\simeq_p Q$
\end{document}

This gives :
enter image description here

But my desired output is :
enter image description here

Anyone can tell me what is the problem here ?

The result is what I expect from \simeq_p. Why do you think it should be different? Setting displaystyle doesn't stack symbols as far as I know. — Martin Scharrer, Apr 12 '13 at 14:23
You should usually use \stackrel from the stackrel package or \underset from the amsmath package for such constructions. Cf. http://tex.stackexchange.com/q/39225/15925 — Andrew Swann, Apr 12 '13 at 14:30
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score 8 · Answer 1 · answered Apr 12 '13 at 14:23

8

Only limits on \mathop operators (like \sum) change in dispaystyle. Limits on relational infix operators stay in subscript position.

You could do

$P \displaystyle\mathrel{\mathop{\simeq}_p} Q$

To locally get mathop positioning and then make the construct a relation again.

answered Apr 12 '13 at 14:23

David Carlisle

757,742

3

@SoumitraSen thanks (you don't have to accept, but if you want to accept you need to click on the accept button to make the tick mark) – David Carlisle Apr 12 '13 at 14:32

Why 'displaystyle' is not working?

1 Answers1