2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/150679Method of derivation of the duality relations for two-dimensional Z(N)-symmetric spin models on finite square lattice wrapped on the torus is proposed. As example, exact duality relations for the nonhomogeneous Ising model (N=2) and the Z(N)-Berezinsky-Villain model are obtained.10 pages, LATEX. Reference addedHigh Energy Physics - TheoryStatistical MechanicsHigh Energy Physics - Latticetext