2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/226763We give a systematic construction of epimorphisms between 2-bridge link groups. Moreover, we show that 2-bridge links having such an epimorphism between their link groups are related by a map between the ambient spaces which only have a certain specific kind of singularity. We show applications of these epimorphisms to the character varieties for 2-bridge links and pi_1-dominating maps among 3-manifolds.This is the version published by Geometry & Topology Monographs on 29 April 2008Geometric Topology57M25, 57M05, 57M50text