2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29753The microcanonical transfer matrix and its extensions offer a new way of obtaining exact partition functions on finite two dimensional lattices. We show the density of the partition function zeros in the complex x- plane for the Ising model at $y=y_c$ and $y=0.5y_c$, and the density of the partition function zeros in the complex y-plane for the three-state Potts model.6 pages, 2 figures, LaTeXStatistical Mechanicstext