2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/160670This paper classifies binary morphisms that map to ultimately periodic words. In particular, if a morphism h maps an infinite non-ultimately periodic word to an ultimately periodic word then it must be true that h(0) commutes with h(1).2 pages, working paperDiscrete MathematicsF.4.3text