What is the command to insert a cross-like sign?

Question

What is the command to insert the following cross-like operator in a latex document?

Thank you for your help.

Answer 1

Just for the heck of it, I built it myself (without amssymb)...works across math styles.

\documentclass{article}
\usepackage{stackengine,graphicx,scalerel}
\newcommand\altltimes{\mathbin{\stretchrel*{%
  |\kern-1.6pt\kern-.5\LMpt\stackengine{0pt}{$\SavedStyle/$}{%
    \reflectbox{$\SavedStyle/$}}{O}{c}{F}{F}{L}}{x}}}
\begin{document}
$a\altltimes b + c$

$\scriptstyle a\altltimes b + c$

$\scriptscriptstyle a\altltimes b + c$
\end{document}

If you prefer a taller symbol, to match the height of a times sign, change the {x} to \times:

\documentclass{article}
\usepackage{stackengine,graphicx,scalerel}
\newcommand\altltimes{\mathbin{\stretchrel*{%
  |\kern-1.6pt\kern-.45\LMpt\stackengine{0pt}{$\SavedStyle/$}{%
    \reflectbox{$\SavedStyle/$}}{O}{c}{F}{F}{L}}{\times}}}
\begin{document}
$a\altltimes b + c$

$\scriptstyle a\altltimes b + c$

$\scriptscriptstyle a\altltimes b + c$
\end{document}

Answer 2

What you are searching for is the following:

\documentclass{article}

\usepackage{ amssymb }

\begin{document}

$\ltimes$

\begin{equation}
    \ltimes
\end{equation}

\end{document}

which produces

Also, for future reference, try using Detexify. Hope I could help :-). Have good holidays.

Answer 3

If you use unicode-math then:

\documentclass[12pt]{article}
\usepackage{unicode-math}
\begin{document}
$\ltimes$
\end{document}