Math & Science ⇒ How to produce a circled perpendicular sign?

[xiaowang]

I want to use a circled perpendicular sign to denote the orthogonal direct sum. It looks like \oplus except the bottom part of "+" is missing. This symbol is available in mathabx package as \obot. But I don't want to use this package since it changes the math font, and is incompatible with fourier package. How do I typeset it without using mathabx or mnsymbol? Thanks.

[kaiserkarl13]

Code: Select all

\documentclass{article}

\newcommand*{\myotop}{\perp\mkern-20.7mu\bigcirc}

\begin{document}
Here's the symbol:  $2 \myotop 3$.
\end{document}

Not perfect, but it may do in a pinch.