Finite type invariants of cyclic branched covers
Finite type invariants of cyclic branched covers
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循环分支覆盖的有限类型不变量
DOI:
10.1016/j.top.2001.12.001
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发表时间:
2001
期刊:
影响因子:
--
通讯作者:
A. Kricker
中科院分区:
文献类型:
--
作者:
S. Garoufalidis;A. Kricker
Given a knot in an integer homology sphere, one can construct a family of closed 3-manifolds (parameterized by the positive integers), namely the cyclic branched coverings of the knot. In this paper, we give a formula for the Casson–Walker invariants of these 3-manifolds in terms of residues of a rational function (which measures the 2-loop part of the Kontsevich integral of a knot) and the signature function of the knot. Our main result actually computes the LMO invariant of cyclic branched covers in terms of a rational invariant of the knot and its signature function.