On Character varieties of two-bridge knot groups

Details On Character varieties of two-bridge knot groups On Character varieties of two-bridge knot groups

2009-02-12

arxiv.org/abs/0902.2195v1

Mathematics

Geometric Topology

36 pages, 4 figures

Scientific paper

We find explicit models for the PSL(2,C)- and SL(2,C)-character varieties of the fundamental groups of complements in S^3 of an infinite family of two-bridge knots that contains the twist knots. We compute the genus of the components of these character varieties, and deduce upper bounds on the degree of the associated trace fields. We also show that these knot complements are fibered if and only if they are commensurable to a fibered knot complement in a Z/2Z-homology sphere, resolving a conjecture of Hoste and Shanahan.

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