# Mathjax

Tinkering with electronics will necessarily involve some math. If I wish to share my explorations, I’ll need to suffer through presenting the equations that I’m using.

Searching about on the web finds Mathjax and some old tutorials (which don’t seem to work with Mathjax 3) about including Mathjax in a hugo site. I was hoping that I could just include Mathjax in the pages where equations are needed, but being new to hugo and Mathjax, I couldn’t figure it out. My fallback is to include Mathjax on every page, which is easily done by adding a file `layouts/partials/extended_head.html`

with the following content:

```
<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>
```

This works in the terminal theme, but may need to be adjusted for other themes.

Below are a couple of simple examples of embedded equations and the source. It’s very simple now. I may add to it as I have needs for more complex equations.

inline math: \(e = i r\) end of inline math.

display math: \[i = \frac{e}{r}\] end of display math

Below is the source for the above:

```
inline math: \\(e = i r\\) end of inline math.
display math: \\[i = \frac{e}{r}\\] end of display math
```

There is a dense tutorial of Mathjax at math.meta.stackexchange with lots of the common use cases.