Inverse problem for the discrete Maxwell equations in a bounded paving

We consider the discrete anisotropic Maxwell operator DaH0 on a bounded paving $\mathrm{\Omega }$ $\subset$ Z3 , where H0 denotes discrete isotropic Maxwell operator and Da a diagonal operator of multiplication containing information about the anisotropy of the medium inside $\mathrm{\Omega }$. Letting a complex number $\lambda$ __ = 0 such the Dirichlet-to-Neumann operator $\mathrm{\Lambda }$(Da) associated with the system DaH0 u = $\lambda$u on $\mathrm{\Omega }$ admits a unique solution, we show that knowing $\mathrm{\Lambda }$(Da) is sufficient to determine Da by a reconstruction procedure for Da.