Use MathJax in Jekyll

Two things need to be done.

1. Config inline mode, so we can use $$

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   <script type="text/x-mathjax-config">

   MathJax.Hub.Config({

   tex2jax: {

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

   processEscapes: true

   }

   });

   </script>

2. Import MathJax: make sure use https

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   <script type="text/javascript"

   src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">

   </script>

3. Two ways to put the latex code

   1. User latex delimiters

      \\(...\\) or $ ... $ for inline and

      \\[...\\] or $$ ... $$ for block

   2. Put the code in {% raw %}{%{% endraw %} raw {% raw %}%}{% endraw %}{% raw %}{%{% endraw %} endraw {% raw %}%}{% endraw %}

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      {% raw %}{%{% endraw %} raw {% raw %}%}{% endraw %}

      $$ put MathJax here $$

      {% raw %}{%{% endraw %} endraw {% raw %}%}{% endraw %}

Style Examples#

• Inline

  $a^2 + b^2 = c^2$ --> note that all equations between these tags will not need escaping!

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  $a^2 + b^2 = c^2$ --> note that all equations between these tags will not need escaping!

• Block

  • Correct way:

    some text before

    $a^2 + b^2 = c^2$

    some text after.

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    some text before

    $$a^2 + b^2 = c^2$$

    some text after.

  • Wrong way 1:

    some text before $a^2 + b^2 = c^2$ some text after.

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    some text before $$a^2 + b^2 = c^2$$ some text after.

  • Wrong way 2:

    some text before $a^2 + b^2 = c^2$ some text after.

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    some text before

    $$a^2 + b^2 = c^2$$

    some text after.

Examples:#

• Special symbols

  1. $\\\{\\\}$

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     $\\\{\\\}$

  2. $\|\|$

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     $\|\|$

• Indent (did not work with Docusaurus)

  1. Must contain 0:

     $\left. \begin{array}{l} 0\quad \_\quad \_\quad \_\quad \_:&10^4\\ \_\quad 0\quad \_\quad \_\quad \_:&10^4\\ \_\quad \_\quad 0\quad \_\quad \_:&10^4\\ \_\quad \_\quad \_\quad 0\quad \_:&10^4\\ \_\quad \_\quad \_\quad \_\quad 0:&10^4 \end{array} \right\} =5\times10^4$
     • How about $00012$, it was counted three times.
     • $10^5 - 9^5$: $9^5$ is who does not contain $0$.

  2. Must contain 0 and 1: $10^5-9^5-9^5+8^5$

  3. Must contain 0:

     $\left. \begin{array}{l} 0\quad \_\quad \_\quad \_\quad \_:&10^4\\ \_\quad 0\quad \_\quad \_\quad \_:&10^4\\ \_\quad \_\quad 0\quad \_\quad \_:&10^4\\ \_\quad \_\quad \_\quad 0\quad \_:&10^4\\ \_\quad \_\quad \_\quad \_\quad 0:&10^4 \end{array} \right\} =5\times10^4$
     • How about $00012$, it was counted three times.
     • $10^5 - 9^5$: $9^5$ is who does not contain $0$.

  4. Must contain 0 and 1: $10^5-9^5-9^5+8^5$