# Adding MathJAX with LaTeX and MathML support to Jekyll

Pages, Numbers, and Keynote gots updates today with LaTeX and MathML support, and it reminded me that I wanted to add to my blog here. I always wanted to do this ever since I saw what was I think Dr. Drang’s MathJax post. Enter MathJax!

## Configuring jekyll

Heavily borrowing from Adding MathJax to a GitHub Pages Jekyll Blog, it was a quick task to add. The main changes to repo:

```
_includes/mathjax.html
assets/js/MathJaxLocal.js
_layouts/posts.html
```

The first two are new files^{1}’^{2} including the necessary javascript code and customization for MathJax. And the `_layouts/posts.html`

edit is to embed the javascript into the jekyll-rendered post page.

```
modified _layouts/post.html
@@ -2,6 +2,8 @@
layout: default
---
+{% include mathjax.html %}
+
<article class="post">
<h1>Adding MathJAX with LaTeX and MathML support to Jekyll</h1>
```

And in the Front Matter of `post`

markdowns, on posts where mathjax is to be enabled:

```
[...]
mathjax: true
[...]
---
```

## Examples

These are my favorite part.

#### Newton’s law of universal gravitation

```
$$ F = G \frac{m_1 m_2} {r^2} $$
```

#### Einstein field equations

```
$$ R_{\mu \nu} - \frac{1} {2}Rg_{\mu \nu} + \Lambda g_{\mu \nu} = \frac{8\pi G} {c^4}T_{\mu \nu} $$
```

Published on June 15, 2018