# How can I find or implement a symbol in LaTeX type of \fint, but having tilda (\sim) crossing the \int?

I tried

\newcommand{\pathint}{\mathrel{\int\!\!\!\!\!\!\!\sim}}


It looks Ok, but it does not hold integration limits right.

• Welcome to TeX.SX! Please help us to help you and add a minimal working example (MWE) that illustrates your problem. It will be much easier for us to reproduce your situation and find out what the issue is when we see compilable code, starting with \documentclass{...} and ending with \end{document}. – cfr Jan 1 '15 at 3:16
• Does this question help? – cfr Jan 1 '15 at 3:17
• Also, there's a closed path integral \oint, and other integration symbols from other packages given in the Comprehensive LaTeX Symbol List linked from cfr's comment. – Mike Renfro Jan 1 '15 at 3:22

I assume you're looking for a version of the Principal Value Integral symbol, but with the centered "dash" symbol replaced with a "tilde" or \sim. Building on some code given in an earlier answer, you could define a macro called \simint using the code given below.

\documentclass{article}
\def\Yint#1{\mathchoice
{\YYint\displaystyle\textstyle{#1}}%
{\YYint\textstyle\scriptstyle{#1}}%
{\YYint\scriptstyle\scriptscriptstyle{#1}}%
{\YYint\scriptscriptstyle\scriptscriptstyle{#1}}%
\!\int}
\def\YYint#1#2#3{{\setbox0=\hbox{$#1{#2#3}{\int}$}
\vcenter{\hbox{$#2#3$}}\kern-.52\wd0}}

\def\simint{\Yint\sim}

\begin{document}
$\displaystyle \simint_a^b f \quad \simint\limits_a^b f \quad \textstyle \simint_a^b f$
\end{document}

• Mico: Thank you so much! This piece of code is simply beautiful. I really enjoyed reading it. And it works great in my LyX! I only finetuned it a bit by changing -.52 to -.50. Thanks again and Happy New Year! – MirOdin Jan 1 '15 at 9:56
• @VladimirVolodin - Glad to know the code is useful. :-) By the way, if you want to reduce slightly the size of the \sim symbol that crosses the \int symbol, you could change \textstyle{#1} to \scriptstyle{#1}, and \scriptstyle{#1} to \scriptscriptstyle{#1}, in the definition of the \Yint macro. – Mico Jan 1 '15 at 12:59