This is difficult for me to explain, but how do I put words over a symbol? For instance, I want to add words over an equal sign. Anyone know the command/syntax for that?
Also adding ^ doesn't cut it..., I want the text to appear ON TOP.
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2What text do you want above the equal sign?– Gonzalo MedinaCommented Sep 25, 2012 at 23:55
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4 Answers
You can use a combination of \stackrel and \mathclap (from the mathtools package):
\documentclass{article}
\usepackage{mathtools}
\newcommand\myeq{\stackrel{\mathclap{\normalfont\mbox{def}}}{=}}
\begin{document}
\begin{align*}
a &\myeq b \\
&=c \\
&= d.
\end{align*}
\end{document}
If using mathtools is not an option, you can use a \makebox of width 0pt:
\documentclass{article}
\usepackage{amsmath}
\newcommand\myeq{\mathrel{\stackrel{\makebox[0pt]{\mbox{\normalfont\tiny def}}}{=}}}
\begin{document}
\begin{align*}
a &\myeq b \\
&=c \\
&= d.
\end{align*}
\end{document}
Even better, if amsmath has been loaded, is to use \overset instead of \stackrel; a little example using \tiny\sffamily for "def" :
\documentclass{article}
\usepackage{amsmath}
\newcommand\myeq{\mathrel{\overset{\makebox[0pt]{\mbox{\normalfont\tiny\sffamily def}}}{=}}}
\begin{document}
\begin{align*}
a &\myeq b \\
&=c \\
&= d.
\end{align*}
\end{document}
Inside the argument for \mbox one can use some of the font modifiers, as I did in my second and third examples.
Particularly, I don't like this kind of notation (it's not really necessary); you should consider if you really need the text above the equal sign.
answered Sep 25, 2012 at 23:55
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Wouldn't be
\mboxbetter than\textin this case, so that thedefis still upshape even e.g. in theorem?– yo'Commented Sep 26, 2012 at 6:43 -
@tohecz -- if upshape is always desired, then the expression (as in this case) is probably an operator name, so that approach would be better. Commented Sep 26, 2012 at 12:44
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I'd prefer
\oversetto\stackrel; instead of\mboxI'd use\mathrmor\textnormal.– egregCommented Sep 26, 2012 at 15:52 -
@egreg; right; I've added an example with
\overset; thank you. I kept the\mboxsince I wanted to illustrate changes to the font for the text (which the OP seems to want to apply according to a comment to the other answer). Commented Sep 26, 2012 at 17:23
$\stackrel{sometext}{=}$
if sometext is not intended to be in math mode then write \text{sometext} within. (\text is available in amsmath package)
$\stackrel{\text{sometext}}{=}$
blessings
answered Sep 25, 2012 at 23:24
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Is it possible to change the size and fonts of the text? I tried {\small sometext|, but it didn't work. Also the syntax isn't working very well in \begin{align}...\end{align} environment– LemonCommented Sep 25, 2012 at 23:36
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6@jak: Please include a minimal working example (MWE) that shows your current usage and highlight clearly what you want or need changed. Do so via an edit to your post.– Werner ♦Commented Sep 25, 2012 at 23:55
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1@jak: You can't use
\smallin mathmode. Have a look at Gonzalo's answer, he successfully uses\tinythere... Commented Sep 26, 2012 at 1:19 -
@Hawk now with my edit, by using the command
\textinside, you can use any text command you want ;) Commented Feb 18, 2016 at 15:54 -
tex.stackexchange.com/a/39230/75621 suggests to use
\undersetinstead of\stackrel, because the former is "obsolete".– AXOCommented Oct 21, 2019 at 16:10
$\overset{\mathrm{def}}{=}$
\overset is available in amsmath package.
Good luck.
answered Feb 11, 2017 at 15:22
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10And with the corresponding
\undersetoption, this the simplest answer. Commented Jan 13, 2018 at 0:51 -
1
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... and I cannot see the difference between
\oversetand\stackrelhere. Commented Jun 11 at 9:49
All answers here suppose that you are using LaTeX (??). If it is not true then there is standard plain TeX macro \buildrel for doing this. The syntax is \buildrel (what above) \over (relation)
$a \buildrel \rm def \over = b$
\bye
