[Tex/LaTex] Flipped \cong symbol

math-mode

I am looking for a mathematical symbol that I have seen in some papers. It looks very similar to the \cong symbol, but is flipped vertically. In other words, what I am looking for is an equal sign underlined by a tilde. I have seen \eqsim, but this is not what I am looking for.

Any help would be greatly appreciated.

Best Answer

\documentclass{article}
\usepackage{mathtools,amssymb,graphicx}
\newcommand*{\mycong}{\mathrel{\text{\raisebox{.25ex}{\rotatebox[origin=c]{180}{$\cong$}}}}}
\begin{document}
$A \mycong B_{A \mycong B_{A \mycong B}}$
\end{document}

enter image description here

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No, you should not print the dot bold. It \dot means a derivative, why should one assume that it's bold version have the same meaning?

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The stmaryrd package offers you \sslash:

\documentclass{article}
\usepackage{stmaryrd}

\begin{document}

${\displaystyle A\sslash B}\quad
A\sslash B\quad
L_{A\sslash B}\quad
L_{M_{A\sslash B}}$

\end{document}

enter image description here

As egreg mentions, one can also define the symbols without extra packages:

\documentclass{article}

\newcommand{\sslash}{\mathbin{/\mkern-6mu/}}

\begin{document}

${\displaystyle A\sslash B}\quad
A\sslash B\quad
L_{A\sslash B}\quad
L_{M_{A\sslash B}}$

\end{document}

enter image description here

Best Answer

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