How to write a dashed congruent sign?

Question

I wanna to write a symbol like this:

I tried\dashcong but it did not work. Does it require a new command? I hope someone can share the code.

You should check the answers here out first, but in this case, I’m not aware of any package that contains it. You might build it with \overset from amsmath. (You’d need aligned-overset if you want to be able to align your equations at this symbol.) — Davislor, May 17 '20 at 01:45
I tried but this symbol does not exist. Maybe it require a now definition. — Varnothing, May 17 '20 at 01:51

Sandy G · Accepted Answer · 2020-05-17T02:53:18.777

You can make your own symbol using the techniques from this post. Here is a version using reflectbox from the graphicx package to make a reflected \cong symbol. Then \ooalign is used to superimpose two white rules to make the dash pattern. You can adjust the spacing of the dashes to your liking.

If you want your symbol to adjust to scriptsize you can use \mathpalette or \mathchoice. See here or here.

\documentclass{article}

\usepackage{graphicx} %for \reflectbox
\usepackage{color} %for \textcolor

\newcommand{\dashcong}{\mathrel{\ooalign{\reflectbox{$\cong$}\cr\hfil\textcolor{white}{\rule[.5ex]{.13em}{.3ex}\hspace{.13em}\rule[.5ex]{.13em}{.3ex}}\hfil\cr}}}

\begin{document}

$A\dashcong B$

\end{document}

How to write a dashed congruent sign?

1 Answers1