Apparently, the Stacks project can load a MathJax extension called `xypic.js`

(check the source code) and then has access to `\xymatrix`

in their MathJax-$\LaTeX$ code. Would it be possible to add this to MO? Diagrams are always quite difficult to do when you can only use matrix environments.

$\begingroup$
$\endgroup$

9
## 1 Answer

$\begingroup$
$\endgroup$

It appears that XyJax is developed independently from MathJax. As a result, MathJax will not support nor test XyJax. This makes integration into MathOverflow difficult since we need to have reliable support for new features. We cannot implement such features without a suitable support plan from the XyJax developers.

`xypic.js`

. $\endgroup$`xypic.js`

may not be ready for prime-time yet. $\endgroup$