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MWE:

\documentclass{article}
\begin{document}
$\wedge{\small\wedge}{\tiny\wedge}$
\end{document}

All the \wedges have the same size...

enter image description here

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1  
I don't think \small works in math mode at all. –  mafp Dec 30 '12 at 18:30

3 Answers 3

up vote 22 down vote accepted

\small and \tiny are text font macros (just like \large, \huge, ...). You most likely received the following font warnings in your .log file:

LaTeX Font Warning: Command \small invalid in math mode on input line 3.

LaTeX Font Warning: Command \tiny invalid in math mode on input line 3.

Inside math mode, in order to use a different (smaller) font, you could/should use \scriptstyle or \scriptscriptstyle:

enter image description here

\documentclass{article}
\begin{document}
$\wedge{\small\wedge}{\tiny\wedge}$\par
$\wedge{\scriptstyle\wedge}{\scriptscriptstyle\wedge}$
\end{document}

\scriptstyle denotes the font size of super-/subscripts, while \scriptscriptstyle denotes the font size for super-/subscripts of super-/subscripts. Thereafter (higher scripting), the font size remains at \scriptscriptsize. See

enter image description here

\documentclass{article}
\begin{document}
$x\ x^x\ x^{x^x}\ x^{x^{x^x}}\ x^{x^{x^{x^x}}}$
\end{document}

That's why there's a suggestion to use \scalebox (and possibly some height adjustment using \raisebox) - it allows you to have a little more variation in the fonts in smaller/larger sized.

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use


$\wedge$\small$\wedge$\tiny$\wedge$\normalsize
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4  
or $\wedge${\small$\wedge$\tiny$\wedge$} so that it's not necessary to return explicitly to \normalsize, since that may or may not actually be the current size (say, in a footnote). –  barbara beeton Dec 30 '12 at 19:42
1  
@barbarabeeton: yes, you're right. As usual :-) –  Herbert Dec 30 '12 at 19:51
    
Can this technique be transferred to environments like equation? –  bluenote10 Jan 17 at 16:42
    
@bluenote10: try it ... ;-) –  Herbert Jan 17 at 17:36
    
@Herbert: I did and I failed :). That is why I'm asking whether there is a trick to "temporarily leave" the equation environment to achieve the same. –  bluenote10 Jan 17 at 19:36

Whenever you want to choose to have a small-sized equation in math mode, I would suggest the following

\documentclass[11pt]{article}    
\usepackage{amsmath, amsthm, amssymb}    
\begin{document}    
\[ 3+3=\text{\footnotesize{\(x^2-13 =\)} \tiny{\( y^3-26 \)} } \]    
\end{document}

Just be careful with parenthesis and spacing!

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