Seifert surgery on knots via Reidemeister torsion and Casson-Walker invariant III
Seifert surgery on knots via Reidemeister torsion and Casson-Walker invariant III
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通过 Reidemeister 扭转和 Casson-Walker 不变量 III 对结进行 Seifert 手术
DOI:
10.1016/j.topol.2018.03.034
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发表时间:
2018
影响因子:
0.6
通讯作者:
Tsuyoshi Sakai
中科院分区:
文献类型:
--
作者:
Teruhisa Kadokami;Noriko Maruyama;Tsuyoshi Sakai
For a knot K in a homology 3-sphere Σ, let M be the result of 2/q-surgery on K, and let X be the universal abelian covering of M. Our first theorem is that if the first homology of X is finite cyclic and M is a Seifert fibered space with N≥ 3 singular fibers, then N≥ 4 if and only if the first homology of the universal abelian covering of X is infinite. Our second theorem is that under an appropriate assumption on the Alexander polynomial of K, if M is a Seifert fibered space, then q=±1 (ie integral surgery).