TeX Input: array support for *{n}{...}

[carloskiki]

Is your feature request related to a problem? Please describe.
I just tried to use the *{n}{...} syntax to specify repetitive columns in the array environment, and it doesn't seem to work.

I don't know if something on my side is not working, but I would like to be able to use this feature.

Thanks!

[dpvc]

The column syntax core MathJax v3 and below is pretty limited, but v4 (now in beta release) is more extensive and extendable. I will make a PR to add this in version 4, but it is not currently available even in the beta release.

[carloskiki]

Okay superb! Thank you!

[Waten11]

Okay superb! Thank you!

Mmmmmm

[Waten11]

#3090 (comment)