# [Tex/LaTex] how to put symbol on top of tensor product

stacking-symbolssymbols

How do I put a $\frown$ right on top of $\otimes$?
I tried \stackrel but it leaves too much space between symbols.

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}