MathJax does not work with the theme.

[yuhouzhou]

I am trying to enable writing LaTex on markdown using MathJax.

The steps to incorporate MathJax:

• Keep markdown:kramdown in the _config.yml file.
• Add

  <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
  <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>

to head.html

This should make me able to write LaTex code between double-dollar signs in Markdown files, but through Jekyll serve, the content between double-dollar signs is ignored.

For example

---
layout: default
title: Test MathJax
author: YY
---

Before 

$$
A + B = C_a
$$

After

Can anyone help? Thanks.

[yuhouzhou]

After changing the aforementioned scripts to

<script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>

It worked.