# MathJax Support

mdBook has optional support for math equations through [MathJax](https://www.mathjax.org/).

To enable MathJax, you need to add the `mathjax-support` key to your `book.toml` under the `output.html` section.

```toml
[output.html]
mathjax-support = true
```

>**Note:**  
The usual delimiters MathJax uses are not yet supported. You can't currently use `$$ ... $$` as delimiters and the `\[ ... \]` delimiters need an extra backslash to work. Hopefully this limitation will be lifted soon.

### Inline equations
Inline equations are delimited by `\\[` and `\\]`. So for example, to render the following inline equation \\( \int x dx = \frac{x^2}{2} + C \\) you would write the following:
```
\\( \int x dx = \frac{x^2}{2} + C \\)
```

### Block equations
Block equations are delimited by `\\[` and `\\]`. To render the following equation

\\[ \mu = \frac{1}{N} \sum_{i=0} x_i \\]


you would write:

```bash
\\[ \mu = \frac{1}{N} \sum_{i=0} x_i \\]
```