# Example input file - Maxwell's Equations
 # Comments are lines whose first character is an '#'.
  # Blank lines and leading whitespace are ignored.
   # Lines should otherwise start and end with an '$'.
 
$\nabla \cdot \mathbf{D} = \rho$
	$\nabla \times \mathbf{H} = J$
$\nabla \times \mathbf{E} + \frac{\partial \mathbf{B}}{\partial t} = 0$
	$\nabla \cdot \mathbf{B} = 0$