# Formulae are not visible in tutorials

**URL:** <https://discourse.abinit.org/t/formulae-are-not-visible-in-tutorials/3005>\
**Category:** Site Feedback\
**Created:** [October 5, 2021, 4:19pm UTC](https://discourse.abinit.org/t/formulae-are-not-visible-in-tutorials/3005 "2021-10-05T16:19:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mjocic](https://discourse.abinit.org/letter_avatar_proxy/v4/letter/m/b19c9b/32.png) [@mjocic](https://discourse.abinit.org/u/mjocic)\
**Post date:** [October 5, 2021, 4:19pm UTC](https://discourse.abinit.org/t/formulae-are-not-visible-in-tutorials/3005/1 "2021-10-05T16:19:39Z")

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Hello,

At the time of writing, I noticed that formulae in tutorials are not visible for me (browser: Firefox 92).

Hope someone will take notice of this soon.

Kind regards,  
Milan Jocic

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**Author:** ![gmatteo](https://discourse.abinit.org/user_avatar/discourse.abinit.org/gmatteo/32/6_2.png) [@gmatteo](https://discourse.abinit.org/u/gmatteo)\
**Post date:** [October 5, 2021, 6:09pm UTC](https://discourse.abinit.org/t/formulae-are-not-visible-in-tutorials/3005/2 "2021-10-05T18:09:55Z")

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Thanks for reporting the issue

I can reproduce the issue with Chrome although the html page loads correctly and I don’t see any javascript warning or error in the console.

What’s even weirder is that the Mathjax equations are displayed correctly if I build and serve a local version of the website.

We are investigating the problem.  
@jmbgmx

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**Author:** ![gmatteo](https://discourse.abinit.org/user_avatar/discourse.abinit.org/gmatteo/32/6_2.png) [@gmatteo](https://discourse.abinit.org/u/gmatteo)\
**Post date:** [October 8, 2021, 11:16am UTC](https://discourse.abinit.org/t/formulae-are-not-visible-in-tutorials/3005/3 "2021-10-08T11:16:18Z")

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The problem has been solved. and we have deployed a new version of the website.