Twisted Alexander polynomials on curves in character varieties of knot groups
Geometric Topology
2013-02-12 v2
Abstract
For a fibered knot in the 3-sphere the twisted Alexander polynomial associated to an SL(2,C)-character is known to be monic. It is conjectured that for a nonfibered knot there is a curve component of the SL(2,C)-character variety containing only finitely many characters whose twisted Alexander polynomials are monic, i.e. finiteness of such characters detects fiberedness of knots. In this paper we discuss the existence of a certain curve component which relates to the conjecture when knots have nonmonic Alexander polynomials. We also discuss the similar problem of detecting the knot genus.
Keywords
Cite
@article{arxiv.1301.1447,
title = {Twisted Alexander polynomials on curves in character varieties of knot groups},
author = {Taehee Kim and Takahiro Kitayama and Takayuki Morifuji},
journal= {arXiv preprint arXiv:1301.1447},
year = {2013}
}
Comments
13 pages, 1 figure; to appear in International Journal of Mathematics