I have a command that has been floating around in my standard preamble for a while:


It is meant to mimic the AMS-LaTeX extendible arrow symbols \xleftarrow and \xrightarrow.

It's not perfect for two reasons:

  1. It does not take the optional lower argument like the AMS \xrightarrow[down]{up}
  2. The overlap of the constituent equals signs is slightly visible.

Does anyone have a better command or know of a package with such a command?


I think you can more or less copy the definitions from amsmath.sty:



\newcommand*{\xeq}[2][]{\ext@arrow 0055\Relbarfill@{#1}{#2}}


$a \xeq[uuuuu]{vvv} b$


The extarrows package provides \xlongequal[below]{above}.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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