How do I put a $\frown$
right on top of $\otimes$
?
I tried \stackrel
but it leaves too much space between symbols.
2 Answers
Here's a possibility:
\documentclass{article}
\usepackage{amsmath}
\makeatletter
\DeclareRobustCommand\frownotimes{\mathbin{\mathpalette\frown@otimes\relax}}
\newcommand{\frown@otimes}[2]{%
\vbox{
\ialign{##\cr
\hidewidth$\m@th#1{}_\frown$\kern-\scriptspace\hidewidth\cr
\noalign{\nointerlineskip\kern-1pt}
$\m@th#1\otimes$\cr
}%
}%
}
\makeatother
\begin{document}
$A\frownotimes B_{x\frownotimes y}$
\end{document}
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2
\documentclass{article}
\usepackage{stackengine,scalerel}
\def\frownotimes{\mathbin{\ThisStyle{\ensurestackMath{\stackengine{-1.4\LMpt}{%
\SavedStyle\otimes}{\mkern1mu\SavedStyle_\frown}{O}{c}{F}{T}{S}}}}}
\begin{document}
$A \frownotimes B_{x \frownotimes y}$
\end{document}