# Packages in StackExchange — possible? If so, how? [closed]

Can you use packages on math.stackexchange?

The help associated with the editor does not mention packages, so I am guessing it's not possible.

But if it is, how? I am particularly interested in the centernot package at the moment.

If there is documentation or a prior question for this, please direct me to it -- I have searched for this answer with no luck. There are responses on package use on tex.stackexchange, but they do not work as-is on stackexchange.

Finally, is this a good place to ask questions about TeX usage in stackexchange? When I tried such a question on meta.math.stackexchange, I got scolded and sent here. Well, it was a generic TeX question, and this one is specific to stackexchange.

Thanks.

-

## closed as off topic by Loop Space, Marco Daniel, lockstep, egreg, Stefan Kottwitz♦Apr 21 '12 at 19:31

Questions on TeX - LaTeX Stack Exchange are expected to relate to TeX, LaTeX or related typesetting systems within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here. If this question can be reworded to fit the rules in the help center, please edit the question.

I'm afraid this is not a great place to ask this, as the automatic conversion your seeing is not actually TeX. StackExchange uses a system called MathJax, which is a way of converting LaTeX-like math input into something human-readable in web browsers. But it does not use TeX, and so there are no packages. –  Joseph Wright Apr 21 '12 at 18:39
BTW, you might find Where are the MathJax LaTeX symbols/environments documented? useful. –  Joseph Wright Apr 21 '12 at 18:42
Looking at the question on maths-SX (meta.math.stackexchange.com/q/3995/2907), you were referred here because you didn't make it clear that you were asking about MathJaX so someone clearly thought you meant in LaTeX, not MathJaX. The point is that as MathJaX does not use TeX but only emulates a part of it, expertise with TeX doesn't help with knowing about MathJaX, so this isn't a likely place to get answers and you'd be better off asking on the MathJaX support sites. –  Loop Space Apr 21 '12 at 19:02
Ah, MathjaX is not TeX -- fundamental insight I was missing. Thanks! –  David Lewis Apr 21 '12 at 19:29
This -- detexify.kirelabs.org/classify.html -- page is dynamite -- you draw a symbol freehand and it guesses (quite well for me so far) what the MathjaX symbol might be. –  David Lewis Apr 21 '12 at 19:38