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I have seen the following two questions on meta:

xymatrix/commutative diagrams

How to draw a commutative diagram?.

Apparently it seems that Math.SE does not support the \begin{xymatrix} environment. When will this feature come into place? I looked at this answer here on tensor products and the \begin{matrix} environment looks terribly inadequate. I know of Arturo's fix in the link above, but I think if say we wanted a diagram with diagonal arrows it would be very messy.

Also, if \begin{xymatrix} comes into Math.SE does that mean that chat will have it to? I have been talking to some people on chat recently and felt that I desperately needed to be able to draw commutative diagrams easily on chat.

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I think you forgot to tag this (pony). – Henning Makholm Apr 15 '12 at 1:09
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There is something called XyJax, but it doesn't look like a very active project, nor does it claims to be production quality. – Henning Makholm Apr 15 '12 at 1:15
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This seems like something you should be asking the MathJax devs, instead of here in meta... – J. M. Apr 15 '12 at 16:34
@Henning: What is pony? – mixedmath♦ Apr 15 '12 at 17:17
@mixedmath: See here and here. – t.b. Apr 15 '12 at 19:25
@t.b. There's a pony tag? Really? Does this mean that the writers of the 4 pony-tagged questions were unaware of its meaning? – mixedmath♦ Apr 15 '12 at 19:53
@mixedmath: Yes, unfortunately. No, it doesn't... – t.b. Apr 15 '12 at 19:58
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@Henning, really? We're encouraging the bad joke that is (pony)? Great, I'm going to start tagging all my meta questions (thoroughbred) from now on. – Rahul Narain Apr 15 '12 at 21:07
@HenningMakholm This is certainly not a request for a pony. Just today I was trying to type up an answer on tensor products. Then I realised that math.se supports no commutative diagrams and I was like sigh..... – BenjaLim Apr 22 '12 at 11:47
Well, the fact that you really want it is unlikely to make it less ponysome to provide. – Henning Makholm Apr 22 '12 at 14:20
@Henning The XyJax package has undergone quite the expansion over the last few months. It is now compatible with the latest MathJax version as a plug-in. The bugs I've submitted so far were dealt with within a reasonable time span. So maybe it's a good thing to look at it again? (Sorry for grave-digging.) – Lord_Farin Apr 17 at 12:16

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