---
title: My demonstration
author:
 - Kurt Gödel
 - Haskell Curry
version:
 - number: 1.0
   date: July 13, 1945
   log:  Initial commit
 - number: 1.1
   date: August 14, 1946
   log:  Added some math
---

# Here is some math

$$
\lim_{h\to0} \frac{\sin(x+h) - \sin(x)}{h} = \cos x .
$$
Also $\limsup_{n\to\infty} a_n$.

\newcommand{\tup}[1]{\langle #1\rangle}

You can define macros!  $\tup{x,y}$

$$
   \nabla \cdot \vec{v} =
   \frac{\partial v_x}{\partial x} +
   \frac{\partial v_y}{\partial y} +
   \frac{\partial v_z}{\partial z}
$$