Take the 2-minute tour ×
TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It's 100% free, no registration required.

I wanna write the sequence $L \underset{\beta_1} \leftrightarrows \overset{ \alpha_1} M \underset{\alpha_2} \leftrightarrows \overset{ \beta_2} N$

with the map \alpha_1 above the arrows and \beta_1 below the arrows, same goes for \alpha_2 and \beta_2.

Any help please?

share|improve this question
    
@NicholasHamilton If you could please write my code in latex, you'd get exactly what I'm talking about :) –  Selena May 4 at 7:53

2 Answers 2

up vote 2 down vote accepted

You can use:

\documentclass{standalone}
\usepackage{amsmath}
\begin{document} 
   $L \underset{\beta_1}{\overset{ \alpha_1} \leftrightarrow}  M
    \underset{\alpha_2}{\overset{ \beta_2} \leftrightarrow}  N$
\end{document}

enter image description here

share|improve this answer
4  
You may want to use \longleftrightarrow instead of \leftrightarrow. –  Mico May 4 at 8:00

You can use the mathtools package's extensible arrows:

L \xleftrightarrow[\beta_1]{\alpha_1} M \xleftrightarrow[\alpha_2]{\beta_2} N
share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.