Extending arrows with overset text

Question

I'd like to extend an arrow to allow better readability of characters which are overset using \overset{}{} .

Right now I have

 \overset{k_1}{\rightleftharpoons}

which produces:

alt text

and this leaves the subscript awfully close the to harpoon arrow. Thus, is there anyway to just extend the character length?

score 25 · Accepted Answer · edited Apr 05 '11 at 02:14

25

There are several packages supporting extensible arrows:

An example suitable for your formula, also demonstrating the optional argument for text under the arrows:

\documentclass{article}
\usepackage{mathtools}
\begin{document}
\[ \xrightleftharpoons[k_2]{\,k_1\,} \]
\end{document}

Output:

result

edited Apr 05 '11 at 02:14

Caramdir

answered Nov 11 '10 at 20:01

Stefan Kottwitz

Thank you, that solves the problem exactly. I've never used mathtools before. – EricR Nov 11 '10 at 21:18
Is it possible to use this command in the 'report' environment? – Guilherme Aug 31 '21 at 22:17
@Guilherme Yes, it is, no change needed. – Stefan Kottwitz Aug 31 '21 at 23:01
But I am using ''\documentclass[10pt, a4paper]{report}'' and do not works. – Guilherme Aug 31 '21 at 23:18
1

@Guilherme It works, check this link: Run with TeXlive.net – Stefan Kottwitz Sep 01 '21 at 09:40
Is it possible to move $$k_2$$ up to be closer to the arrow? raisebox seems not to work. – Eric Nov 13 '23 at 19:53

1 Answers1