Test of render-math plugin
This is a test of render-math plugin of pelican
\newcommand{\pp}[2]{\frac{\partial #1}{\partial #2}} \newcommand{\bb}{\pi R} \newcommand{\bc}{\pi r}
$$\frac{\partial A}{\partial t}$$
$$
J(\theta) = \frac 1 2 \sum_{i=1}^m (h_\theta(x^{(i)})-y^{(i)})^2
$$
The God said:
Let there be light
Thus:
$$
\nabla \cdot E = \frac{\rho}{\epsilon_0}
$$
$$
\nabla \cdot B =0
$$
$$
\nabla \times E = - \frac{\partial B}{\partial t}
$$
$$
\nabla \times B = \mu_0 J + \mu_0 \epsilon_0 \frac{\partial E}{\partial t}
$$