v 2.7

$${\frac{\partial E_y}{ \partial z} = - \mu \mu_0 \frac{\partial H_x}{\partial t} \\ \frac{\partial E_x}{ \partial z} = - \mu \mu_0 \frac{\partial H_y}{\partial t} \\ 0 = - \mu \mu_0 \frac{\partial H_z}{\partial t}}$$