Affine cubic surfaces and character varieties of knots
Affine cubic surfaces and character varieties of knots
复制标题
仿射立方曲面和结的特征变种
DOI:
10.1016/j.jalgebra.2017.11.015
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发表时间:
2018
影响因子:
0.9
通讯作者:
Samuelson, Peter
中科院分区:
文献类型:
--
作者:
Berest, Yuri;Samuelson, Peter
It is known that the fundamental group homomorphism π 1 (T 2)→ π 1 (S 3∖ K) induced by the inclusion of the boundary torus into the complement of a knot K in S 3 is a complete knot invariant. Many classical invariants of knots arise from the natural (restriction) map induced by the above homomorphism on the SL 2-character varieties of the corresponding fundamental groups. In our earlier work [3], we proposed a conjecture that the classical restriction map admits a canonical deformation into a two-parameter family of affine cubic surfaces in C 3. In this paper, we show that (modulo some mild technical conditions) our conjecture follows from a known conjecture of Brumfiel and Hilden [1] on the algebraic structure of the peripheral system of a knot. We then confirm the Brumfiel–Hilden conjecture for an infinite class of knots, including all torus knots, 2-bridge knots, and certain pretzel knots. We also show the class of knots for which the Brumfiel–Hilden conjecture holds is closed under taking connect sums and knot coverings.
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DOI:
10.3842/sigma.2008.052
发表时间:
2007
影响因子:
0.9
作者:
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2012
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