2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/227073We study the equality problem for infinite words obtained by iterating morphisms. In particular, we give a practical algorithm to decide whether or not two words generated by primitive morphisms are equal.Preliminary version of a paper to appear in Information and ComputationFormal Languages and Automata TheoryF.4.3text