mathjax for Anki \oiint

[foy.se...@gmail.com]

Hello,

I'd like to use Anki to help my students. I teach Physics.

I need to write the \oiint. It is easy with Latex but not very nice in anki.

MathJax is much lore beautiful but unfortunatly \oiint is not recognized...

I imagine it's because a package lefts (I've just forgotten his name but no matter, that's not the problem ;) ). But I do not know how to figure out  it in Anki...

Thanks for your help.

Sébastien

[Davide Cervone]

The glyph for \oiint is not in the MathJax TeX fonts, and so there is no macro for it by default.  If you are using MathJax v2, you can load the mediawiki-texvc extension, which defines it (and a number of other similar macros).  If you are using version 3 of Mathjax, you can use

<script>

MathJax = {

  tex: {

    macros: {

      unicodeInt: ['\\mathop{\\vcenter{\\mathchoice{\\huge\\unicode{#1}}{\\unicode{#1}}{\\unicode{#1}}{\\unicode{#1}}}}\\nolimits', 1],

      oiint: '\unicodeInt{x222F}'

  }

}

</script>

to define \oiint.  Note that the character used for the integral will be taken from a system font installed on the user's computer, so it may or may not look like you would want it to.  The quality will depend on the fonts available on the user's system, and they likely will not match the other integrals in your expressions.

In version 2, you can select the STIX fonts if you are using SVG or HTML-CSS output for better consistency, as the STIX fonts do include the needed character.

Davide

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[Sébastien Foy]

Thanks u Davide. I try it as soon as I can reach my computer... Unfortunately it seems a bit complicated for me. I don't even know whet I can get the version of math Jax. The script is to be written each time or has it to be save somewhere? Thanks u a lot. 

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[Davide Cervone]

 I don't even know whet I can get the version of math Jax. The script is to be written each time or has it to be save somewhere?

I assume Anki allows you to customize the HTML that it uses.  A quick Google search found me this:

https://www.reddit.com/r/Anki/comments/4xt2a2/customizing_your_anki_cards_tutorial/

that suggest that there is customization for the template for the cards that you could use to add MathJax and your own configuration.  The picture

https://i.gyazo.com/29f794c2aa80264abc17f499d6e6cff9.png

suggests that the "Front Template" may be the right location for it.  Try adding

<script>

MathJax = {

  tex: {

    inlineMath: [['$','$'], ['\\(','\\)']],

    macros: {

      unicodeInt: ['\\mathop{\\vcenter{\\mathchoice{\\huge\\unicode{#1}}{\\unicode{#1}}{\\unicode{#1}}{\\unicode{#1}}}}\\nolimits', 1],

      oiint: '\unicodeInt{x222F}'

  }

}

</script>

<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js"></script>

at the top of that text box and see if that works for you.  Use $x+y$ for in-line math and $$\frac x y$$ for displayed math expressions.

Davide

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[Sébastien Foy]

OK Davide. As I am not fluent I may have understand I. The wrong way what you wrote. I did have personalize the ccs in Anki. It should be at the same place? I'll see and tell you back. But $$ already works in math Jax. As soon as I am back from mountain! A great tkx u

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