Epimorphisms between 2-bridge link groups
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We 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 2008
This is the version published by Geometry & Topology Monographs on 29 April 2008