Math formulas are not rendered

[mazen-mardini]

Hello!

Math formulas in for example (Theoretical) Computer Science are not rendered. Normally, MathJax should render an expression such as $a \in R$ to a ∈ R, but it doesn't.

I suspect that this affects all StackOverflow packages.

[kelson42]

Indeed, see https://library.kiwix.org/viewer#mathoverflow.net_en_all_2023-01/questions/31448/lower-bounds-in-theoretical-computer-science

Or

https://library.kiwix.org/viewer#mathoverflow.net_en_all_2023-01/questions/tagged/diophantine-equations

Looks like a regression to me.

[rgaudin]

Original:
https://mathoverflow.net/questions/227713/estimating-the-size-of-solutions-of-a-diophantine-equation

ZIM
https://library.kiwix.org/viewer#mathoverflow.net_en_all_2023-01/questions/227713/estimating-the-size-of-solutions-of-a-diophantine-equation

MathJax is found but not applied 🫤

@kelson42 the questions list doesn't uses mathjax on the original website neither: https://mathoverflow.net/search?q=estimating-the-size-of-solutions-of-a-diophantine-equation

[mazen-mardini]

@rgaudin Something else worth noting from your example, is that the embedded image seems to be incorrect as well.

This applies to the earlier version of the question, which the ZIM is based on: https://mathoverflow.net/posts/227713/revisions

[rgaudin]

@mazen-mardini thank you for noticing! I've opened a separate ticket.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.

[Jaifroid]

Reddit users are complaining about this here: https://www.reddit.com/r/Kiwix/comments/1g5q59l/how_to_render_latexmathjax_on_kiwix/

[kelson42]

New complain here kiwix/kiwix-desktop#1225

To me, this is priority now to fux this. Too many people are impacted.

[benoit74]

It looks like the problem is mostly simple: MathJax configuration is not done properly, so only default MathJax configuration is applied.

Currently, configuring MathJax is based on a src attribute (see

sotoki/src/sotoki/templates/base.html

Line 32 in da6514a

<script src="{{ to_root }}static/js/MathJax.js?config=TeX-AMS_HTML-full"></script>

) where configuration must be inline according to the documentation (https://docs.mathjax.org/en/v2.0-latest/configuration.html).

This means that we do not enable the $...$ TeX syntax which is disabled by default (https://docs.mathjax.org/en/stable/tex.html).

I hacked the sample webpage on my browser and it works well (all equations are handled by MathJax).

Hacks (not sure all actions are required, I'm too lazy to confirm) are as follow:

Set the configuration inline instead of in an src (simply modify the DOM in inspector).

Remove existing MathJax script tag sourcing ../../static/js/MathJax.js?config=TeX-AMS_HTML-full (simply modify the DOM in inspector).

Cleanup MathJax (in debugger):

delete MathJax 

Add MathJax back:

const newScript = document.createElement('script')
newScript.src = '../../static/js/MathJax.js?config=TeX-AMS_HTML-full' 
document.head.appendChild(script2) 

Et voilà.

This now has to be incorporated in the codebase and tested in a real ZIM.

I'm not that experienced with sotoki, is there a possibility to test a modification without running the full scrape? Or should I just "zimrecreate" the ZIM with one or two modified HTML to confirm the solution? Or I'm maybe just overengineering the thing, it is supposed to take only 1 or 2 hours to run mathoverflow after all.

[rgaudin]

Shouldn't be that long. You can push a dev tag to try in ZF if you don't want to invest in this just for this issue which seems like a quick fix