Twisted alexander polynomials and character varieties of 2-bridge knot groups

Taehee Kim, Takayuki Morifuji

研究成果: Review article査読

9 被引用数 (Scopus)

抄録

We study the twisted Alexander polynomial from the viewpoint of the SL(2,&Cmathbb;)-character variety of nonabelian representations of a knot group. It is known that if a knot is fibered, then the twisted Alexander polynomials associated with nonabelian SL(2,&Cmathbb;)-representations are all monic. In this paper, we show that for a 2-bridge knot there exists a curve component in the SL(2,&Cmathbb;)-character variety such that if the knot is not fibered then there are only finitely many characters in the component for which the associated twisted Alexander polynomials are monic. We also show that for a 2-bridge knot of genus g, in the above curve component for all but finitely many characters the associated twisted Alexander polynomials have degree 4g - 2.

本文言語English
論文番号1250022
ジャーナルInternational Journal of Mathematics
23
6
DOI
出版ステータスPublished - 2012 6

ASJC Scopus subject areas

  • Mathematics(all)

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