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<title>UK TeX FAQ -- question label prinvalint</title>
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<h3>The Principal Value Integral symbol</h3>
<p/>This symbol (an integral sign, ‘crossed’) does not appear in any of
the fonts ordinarily available to (La)TeX users, but it can be
created by use of the following macros:
<pre>
\def\Xint#1{\mathchoice
{\XXint\displaystyle\textstyle{#1}}%
{\XXint\textstyle\scriptstyle{#1}}%
{\XXint\scriptstyle\scriptscriptstyle{#1}}%
{\XXint\scriptscriptstyle\scriptscriptstyle{#1}}%
\!\int}
\def\XXint#1#2#3{{\setbox0=\hbox{$#1{#2#3}{\int}$}
\vcenter{\hbox{$#2#3$}}\kern-.5\wd0}}
\def\ddashint{\Xint=}
\def\dashint{\Xint-}
</pre>
<code>\</code><code>dashint</code> gives a single-dashed integral sign, <code>\</code><code>ddashint</code> a
double-dashed one.
<p/><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=prinvalint">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=prinvalint</a>
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