Test2math

De Cadedif

$\begin{cases} &\displaystyle -{\rm i}\, \frac{\partial}{\partial t} E_1- \Delta E_1 = \mu_1 |E_1|^2E_1+\beta |E_2|^2E_1,\quad x\in \mathbb{R}^n,\quad t>0\\[0.3cm] & \displaystyle -{\rm i}\, \frac{\partial}{\partial t} E_2- \Delta E_2 = \mu_2 |E_2|^2E_2+\beta |E_1|^2E_2,\quad x\in \mathbb{R}^n,\quad t>0, \end{cases}$

the coupled parameter

$\beta\in \mathbb{R}$ ,