# Advanced examples of notation

## MathJax

You can enable MathJax by setting `latex: true`

on a page or globally in the `_config.yml`

. Some examples:

Euler’s formula relates the complex exponential function to the trigonometric functions.

$e^{i\theta}=\cos(\theta)+i\sin(\theta)$The Euler-Lagrange differential equation is the fundamental equation of calculus of variations.

$\frac{\mathrm{d}}{\mathrm{d}t} \left ( \frac{\partial L}{\partial \dot{q}} \right ) = \frac{\partial L}{\partial q}$The Schrödinger equation describes how the quantum state of a quantum system changes with time.

$i\hbar\frac{\partial}{\partial t} \Psi(\mathbf{r},t) = \left [ \frac{-\hbar^2}{2\mu}\nabla^2 + V(\mathbf{r},t)\right ] \Psi(\mathbf{r},t)$## Code

Embed code by putting `{% highlight language %}`

`{% endhighlight %}`

blocks around it.

## Gists (WARNING: this method is not currently javascript free)

With the `jekyll-gist`

plugin, which is preinstalled on Github Pages, you can embed gists simply by using the `gist`

command:

```
```

## Images

Upload an image to the *assets* folder and embed it with `![title](/assets/name.jpg))`

. Keep in mind that the path needs to be adjusted if Jekyll is run inside a subfolder.

The `.large`

wrapper can be used to increase the width of an image or iframe.

Flower by Tj Holowaychuk

Swiss Alps by René Reichelt

## Embedded content

You can also embed a lot of stuff, for example from YouTube, using the `embed.html`

include.

```
class="large">
style="position: relative; margin: 1.5em 0; padding-bottom: 56.25%;">
```

```
```

```
```