**8. Conclusion**

To finalize our finding, within the earlier developed quasi-relativistic model of graphene, the frequency-dependent conductivity of graphene has been investigated theoretically in a number of experimentally interesting cases. It has been demonstrated that accounting of exchange interactions in the model which leads to its topological nontriviality both in electron structure and quasi-particle excitations not only modifies Ohmic conductivity dependencies both on frequency and temperature but also adds few contributions to conductivity stipulated by Majorana-like mass term corrections. Account of these corrections allows one to obtain a fine description of experimentally observable effects in graphene conductivity dependencies as in frequency domain as for knows unsolved problem of minimum DC-conductivity.
