Enumeration indicator for number of arguments of a function

I'm trying to replicate this style of indicator for dotted enumeration as suggested below

Can some one help me with this one?

I have done a possible MWE for your question modificated thank to the suggestion of @Henri Menke's comment for \dotsb.

\documentclass[a4paper,12pt]{article}
\usepackage{mathtools}
\begin{document}
$t\colon \underbrace{V\times V\times\dotsb\times V}_{k+1\text{-times}}\rightarrow V$
\end{document}

After if you prefer to have the same characters of the picture, you can use a clone of Times (New Roman) that is the newtx package (newtxtext + newtxmath).

This is a screenshot:

\documentclass[a4paper,12pt]{article}
\usepackage{mathtools}
\usepackage{newtxtext, newtxmath}
\begin{document}
$t\colon \underbrace{V\times V\times\dotsb\times V}_{k+1\text{-times}}\rightarrow V$
\end{document}
• The amsmath documentation suggests to use \dotsb for “dots with binary operators/relations”, i.e. V \times \dotsb \times V. – Henri Menke May 1 at 0:16