2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27035Recent exact results for a particle-exchange model on a linear lattice, with only irreversible moves reducing the local energy allowed, are reviewed. This model describes a zero-temperature Kawasaki-type phase separation process which reaches a frozen, initial-condition-dependent state at large times.nine pages, plain TeXCondensed Mattertext