# LaTeX symbol for the Kulkarni-Nomizu product [duplicate]

I would like to know how to type the symbol of Kulkarni-Nomizu product in LaTeX:

I tried to use Detexify, but it does not give me anything.

## marked as duplicate by Andrew Swann, CarLaTeX, AlexG, Thomas F. Sturm, Stefan PinnowMar 16 '17 at 13:58

• It is \owedge in the stmaryrd fonts. – Andrew Swann Mar 16 '17 at 7:28
• @AndrewSwann You should post another answer! – CarLaTeX Mar 16 '17 at 7:31

You can combine \bigcirc with \wedge.

Of course, you can also create and use a new command. The result is, obviously, the same with or without the new command.

Edit:

However, with \mspace the symbol becomes misaligned when used in \scriptstyle or - worse - in \scriptscriptstyle.

\documentclass{article}
\usepackage{amsmath, amssymb}

% Of course, you can create...
\newcommand{\KN}{\mathbin{\bigcirc\mspace{-15mu}\wedge\mspace{3mu}}}

\begin{document}
$h \mathbin{\bigcirc\mspace{-15mu}\wedge\mspace{3mu}} k$
% ... and use a new command:
$h \KN k$
$x_{h \KN k}$
$y_{x_{h \KN k}}$
\end{document}


See the output:

• It should be \mathbin. – egreg Mar 16 '17 at 7:18
• @egreg Corrected, I've also added a little space at the end, otherwise the k was too close to the symbol! – CarLaTeX Mar 16 '17 at 7:27
• Yes: my measurement says that \wedge is 12mu wide, so if you back up by 15mu, you have to compensate with 3mu, which is what \, does in math mode; however, I'd use explicitly \mspace{3mu} for consistency. – egreg Mar 16 '17 at 7:56
• @EnricoMariaDeAngelis Thank you for editing! – CarLaTeX Mar 16 '17 at 8:46

A solution with \ooalign.

\documentclass{article}

\makeatletter
\newcommand*\owedge{\mathpalette\@owedge\relax}
\newcommand*\@owedge[1]{%
\mathbin{%
\ooalign{%
$#1\m@th\bigcirc$\cr
\hidewidth$#1\m@th\wedge$\hidewidth\cr
}%
}%
}
\makeatother

\begin{document}

$h \owedge k_{h \owedge k_{h \owedge k}}$

\end{document}


• Thanks, Henri. But I can only accept one answer. – Paul Mar 16 '17 at 10:01
• @Paul It's better if you accept Henri's solution, my symbol messes up when used in \scriptstyle or - worse - in \scriptscriptstyle. See the edited version of my answer. – CarLaTeX Mar 24 '17 at 6:08