## MathJax

You can enable MathJax by setting `mathjax: true` on a page or globally in the `_config.yml`. Some examples:

[Euler's formula](https://en.wikipedia.org/wiki/Euler%27s_formula) relates the  complex exponential function to the trigonometric functions.

$$ e^{i\theta}=\cos(\theta)+i\sin(\theta) $$

The [Euler-Lagrange](https://en.wikipedia.org/wiki/Lagrangian_mechanics) 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](https://en.wikipedia.org/wiki/Schr%C3%B6dinger_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.

<figure class="highlight"><pre><code class="language-c" data-lang="c"><span class="k">static</span> <span class="kt">void</span> <span class="nf">asyncEnabled</span><span class="p">(</span><span class="n">Dict</span><span class="o">*</span> <span class="n">args</span><span class="p">,</span> <span class="kt">void</span><span class="o">*</span> <span class="n">vAdmin</span><span class="p">,</span> <span class="n">String</span><span class="o">*</span> <span class="n">txid</span><span class="p">,</span> <span class="k">struct</span> <span class="n">Allocator</span><span class="o">*</span> <span class="n">requestAlloc</span><span class="p">)</span>
<span class="p">{</span>
    <span class="k">struct</span> <span class="n">Admin</span><span class="o">*</span> <span class="n">admin</span> <span class="o">=</span> <span class="n">Identity_check</span><span class="p">((</span><span class="k">struct</span> <span class="n">Admin</span><span class="o">*</span><span class="p">)</span> <span class="n">vAdmin</span><span class="p">);</span>
    <span class="kt">int64_t</span> <span class="n">enabled</span> <span class="o">=</span> <span class="n">admin</span><span class="o">-&gt;</span><span class="n">asyncEnabled</span><span class="p">;</span>
    <span class="n">Dict</span> <span class="n">d</span> <span class="o">=</span> <span class="n">Dict_CONST</span><span class="p">(</span><span class="n">String_CONST</span><span class="p">(</span><span class="s">"asyncEnabled"</span><span class="p">),</span> <span class="n">Int_OBJ</span><span class="p">(</span><span class="n">enabled</span><span class="p">),</span> <span class="nb">NULL</span><span class="p">);</span>
    <span class="n">Admin_sendMessage</span><span class="p">(</span><span class="o">&amp;</span><span class="n">d</span><span class="p">,</span> <span class="n">txid</span><span class="p">,</span> <span class="n">admin</span><span class="p">);</span>
<span class="p">}</span></code></pre></figure>

## 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](https://user-images.githubusercontent.com/4943215/55412447-bcdb6c80-5567-11e9-8d12-b1e35fd5e50c.jpg)

[Flower](https://unsplash.com/photos/iGrsa9rL11o) by Tj Holowaychuk

<div class="large" markdown="1">
![Swiss Alps](https://user-images.githubusercontent.com/4943215/55412536-edbba180-5567-11e9-9c70-6d33bca3f8ed.jpg)
</div>

[Swiss Alps](https://unsplash.com/photos/u0DmxB76uF4) by René Reichelt

## Embedded content

You can also embed a lot of stuff, for example from YouTube. To scale the video to full width use the `<div class="embed"></div>` wrapper around the iframe.

<div class="large embed"><iframe src="https://www.youtube.com/embed/_C0A5zX-iqM" frameborder="0" allowfullscreen></iframe></div>