2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29155We show how to compute the generating function of the self-avoiding polygons on a lattice by using the statistical mechanics Schwinger-Dyson equations for the correlation functions of the $N$-vector spin model on that lattice.7 pages, latex, no figuresCondensed MatterHigh Energy Physics - Latticetext