[Tex/LaTex] Element-wise exponential function

math-operators

I use $\odot$ for element-wise multiplication of vectors and matrices, and $\oslash$ for element-wise division. What are good ways of denoting an element-wise exponential function? I have tried, using amsmath, \overset{\circ}{\exp} or \exp_\circ, but I don't like any of those very much.

Best Answer

One option:

\documentclass{article}
\usepackage{amsmath}

\newcommand{\Pexp}{\mathbin{\text{$\vcenter{\hbox{\textcircled{$e$}}}$}}}

\begin{document}

${\displaystyle A \Pexp B}\quad
A \Pexp B\quad
L_{A \Pexp B}\quad 
M_{L_{A \Pexp B}} 
$

\end{document}

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It's probably worth noting that stackexchange doesn't use TeX but rather MathJax. MathJax is a JavaScript Library that uses a LaTeX-like syntax for mathematics.

LaTeX produces complete documents so a typical LaTeX document will look like

\documentclass{article}
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If you find a LaTeX guide online that is the sort of thing it will describe. None of that markup works in MathJax, MathJax just deals with the math expressions such as $\sqrt{x}$ to get a square root.

There are several sites that allow you to experiment interactively with MathJax seeing how the expression would display before you submit it This one for example

http://www.texrendr.com/

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