2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/76273The two-point correlation function of a Potts model on a graph $G$ may be expressed in terms of the flow polynomials of `Poissonian' random graphs derived from $G$ by replacing each edge by a Poisson-distributed number of copies of itself. This fact extends to Potts models the so-called random-current expansion of the Ising model.ProbabilityMathematical Physics60K35, 82B20, 05C99text