A full-twist inequality for the ν + -invariant

A full-twist inequality for the ν + -invariant
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ν + -不变量的全扭转不等式

DOI:
10.1016/j.topol.2018.06.010
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发表时间:
2017
影响因子:
0.6
通讯作者:
Kouki Sato
Kouki Sato
中科院分区:
数学4区
文献类型:
--
作者:
Kouki Sato

文献摘要

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Hom 和 Wu 引入了一个称为 ν+ 的结索引不变量,它主导着许多源自 Heegaard Floer 同源性的索引不变量。在本文中,我们给出了 ν+ 的全扭转不等式。通过使用这个不等式,我们将 Wu 的 ν+ 布线公式(仅针对特定的正电缆证明)以不等式的形式扩展到所有电缆。此外,我们还讨论了ν+-等价,它是结索引群上的等价关系。我们引入了 ν+-等价类的偏序,并研究了它与全扭曲的关系。
Hom and Wu introduced a knot concordance invariant called ν+, which dominates many concordance invariants derived from Heegaard Floer homology. In this paper, we give a full-twist inequality for ν+. By using the inequality, we extend Wu's cabling formula for ν+(which is proved only for particular positive cables) to all cables in the form of an inequality. In addition, we also discuss ν+-equivalence, which is an equivalence relation on the knot concordance group. We introduce a partial order on ν+-equivalence classes, and study its relationship to full-twists.