Snippet to add MathJax to Jekyll Blog.

add_mathjax_to_jekyll_head.html

  <!-- From https://github.com/fastai/fast_template/blob/6f72d2957a4e302e437f4437dd6a1e5a1f14274a/_includes/head.html -->
  {% if site.use_mathjax %}
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/katex.min.css" integrity="sha384-zB1R0rpPzHqg7Kpt0Aljp8JPLqbXI3bhnPWROx27a9N0Ll6ZP/+DiW/UqRcLbRjq" crossorigin="anonymous">
    <script type="text/javascript" async src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-MML-AM_CHTML"> </script>
    <script defer src="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/katex.min.js" integrity="sha384-y23I5Q6l+B6vatafAwxRu/0oK/79VlbSz7Q9aiSZUvyWYIYsd+qj+o24G5ZU2zJz" crossorigin="anonymous"></script>
    <script defer src="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/contrib/auto-render.min.js" integrity="sha384-kWPLUVMOks5AQFrykwIup5lo0m3iMkkHrD0uJ4H5cjeGihAutqP0yW0J6dpFiVkI" crossorigin="anonymous"></script>
    <script>
      document.addEventListener("DOMContentLoaded", function() {
        renderMathInElement( document.body, {
          delimiters: [
            {left: "$$", right: "$$", display: true},
            {left: "[%", right: "%]", display: true},
            {left: "$", right: "$", display: false}
          ]}
        );
      });
    </script>
  {% endif %}