Concordance invariants from higher order covers

Concordance invariants from higher order covers
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高阶覆盖的一致性不变量

DOI:
10.1016/j.topol.2012.03.014
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发表时间:
2008
影响因子:
0.6
通讯作者:
Stanislav Jabuka
Stanislav Jabuka
中科院分区:
数学4区
文献类型:
--
作者:
Stanislav Jabuka

文献摘要

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我们将结点K∧s3m的manolesu - owens光滑调和不变量δ(K)推广到通过考虑pn阶的覆盖而得到的不变量[公式:见文本],其中p为a素数。我们的主要结果表明,对于任意素数p≠2,由此得到的光滑协调群到Z∞的同态[公式:见文]具有无穷秩。我们还表明,与δ不同,这些新的不变量通常不是结特征的倍数,即使对于交替结也是如此。这篇文章的很大一部分致力于探索示例。
We generalize the Manolescu–Owens smooth concordance invariant δ(K) of knots K⊂S3to invariants [Formula: see text] obtained by considering covers of order pn, with p a prime. Our main result shows that for any prime p≠2, the thus obtained homomorphism [Formula: see text] from the smooth concordance group to Z∞has infinite rank. We also show that unlike δ, these new invariants typically are not multiples of the knot signature, even for alternating knots. A significant portion of the article is devoted to exploring examples.