Hash Viewer

# Title or Header 1

> Hash Viewer lets you display and share Markdown, HTML, and rendered math (TeX) without any server side-components. It works by storing page content in the URL.
> 
> — Matthew Wildrick Thomas

## Section (formatting)

Write **bold**, *italic*, , ***bold italic***, ~~strikethrough~~, or <u>underline</u> (HTML).
Escape: \*.
Link: [a link](https://mwt.me)

### 1.1. Subsection

Sections aren't auto-numbered. Number manually.

#### ***Subsubsection (lists and code)***

Formatting also works in headings. Levels go down to `######`.

Supported:
* Tables
* Math in TeX form with \$\$
* Environments for theorems, proofs, and definitions

*Not* supported:
1. Footnotes
2. `{.class #id}` attributes
   * Use HTML instead
3. Code syntax highlighting

Code blocks are supported, but look like
   ```
   def f(x):
      return x**2
   ```

---

#### ***Tables***

| Tables       | Are       | Supported     |
| ------------ | --------- | ------------- |
| this table   | cool      | *italic*      |
| other tables | also cool | **bold**      |
| no tables    | bad       | ~~alignment~~ |

---

#### ***Math***

Use display math:

$$\int_0^1 f(x)\,dx = \lim_{n\to\infty} \sum_{t=1}^n f \left( \frac{t}{n} \right) \frac{1}{n}$$

Inline math is not supported (no need to escape $). Use display math. Inline can be hacked with \\$x^2\\$, but at least one display block is required for MathJaX to load.

---

#### ***Theorems and proofs***

<div class=theorem>
The area of a unit right triangle can be calculated with the right hand rule from calculus,

$$\int_0^1 x\,dx = \frac{1}{2}.$$
</div>

<div class=proof>
Recall for any continuous function,

$$\int_0^1 f(x)\,dx = \lim_{n\to\infty} \sum_{t=1}^n f \left( \frac{t}{n} \right) \frac{1}{n}.$$

Then,
$$\begin{align*}
   \int_0^1 x\,dx &= \lim_{n\to\infty} \sum_{t=1}^n \frac{t}{n} \frac{1}{n} \\
                  &= \lim_{n\to\infty} \frac{1}{n^2} \cdot \sum_{t=1}^n t \\
                  &= \lim_{n\to\infty} \frac{1}{n^2} \cdot \frac{n(n+1)}{2} \\
                  &= \lim_{n\to\infty} \frac{n^2 + n}{2n^2} \\
                  &= \lim_{n\to\infty} \left( \frac{1}{2} + \frac{1}{2n} \right) = \frac{1}{2}.
\end{align*}$$
</div>