Math & Science ⇒ How to add arrow superimposed on the text

[eneacasucci]

I don't know how to write this formula, in particular i need the part highlighted in yellow.

[Stefan Kottwitz]

Hi,

welcome to the forum!

The probably easiest way is using the cancel package:

Code: Select all

\documentclass{article}
\usepackage{cancel}
\begin{document}
$\cancelto{1}{m}$
\end{document}

Stefan