The computations used to derive Theorem 9 are similar to those done by Morame and
Suslina in their studies on the periodic Maxwell operator.

Our aim is to use Theorem 9 to derive a meromorphic continuation of the resolvent of
the extended Maxwell operator.

Therefore, we use the following immediate consequence of Theorem 9



Of course, both (6) and (7) can be supplemented with boundary conditions and thus
yield equalities between operators.
This can be done for the quasi-periodic conditions occurring in the Floquet theory.

As  and  are zeroth order operator, as for the standard Schrödinger operator, one 
constructs a meromorphic continuation for the resolvent of 
acting on   with quasi-periodic boundary conditions, namely