Singularity index of the electromagnetic field on the edge in the presence of the Veselago medium

The singularity index of the electromagnetic field on the edge of wedge structures of two types (with and without ideally conducting sides) is investigated in the presence of a sector of a medium with negative permittivity and permeability (the Veselago medium). Restrictions on the material and geometrical parameters at which the condition on the edge is violated are determined. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 8, pp. 56–58, August, 2006.