Undefined control sequence \centerdot

Question

I am getting an "Undefined control sequence" error when I try to use the

\centerdot

command, even though that command is shown in many references as the way to insert a centered dot. What is the problem?

Answer 1

You might need amssymb:

\documentclass{article}
\usepackage{amssymb}
\begin{document}
$\centerdot$
\end{document}