2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/110554We consider an individual-based two-dimensional spatial model with nearest-neighbor preemptive competition to study front propagation between an invader and a resident species. In particular, we investigate the asymptotic front velocity and compare it with mean-field predictions.Computer Simulation Studies in Condensed Matter Physics XIX, edited by D.P. Landau, S.P. Lewis, and H.-B. Schuttler, (Springer, Heidelberg, Berlin, in press)Populations and EvolutionStatistical Mechanicstext