This is maybe easy question.
How is the right/good way to put a hat on a binary operator like \otimes
?
For example a\otimes b
vs a\hat\otimes b
In the second case it is not typeset as a binary operator anymore, i.e. missing spaces.
Use a\mathbin{\hat\otimes}b
to retrieve the original spacing of a binary operator:
\documentclass{article}
\begin{document}
$a\otimes b \quad a\hat\otimes b \quad a\mathbin{\hat\otimes}b$
\end{document}