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arXiv 2602.04334math.GT
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双切结与3维流形在4维流形中的嵌入

Doubly slicing knots and embedding 3-manifolds in 4-manifolds

Kyung Hee University(庆熙大学);Konkuk University(建国大学)

Se-Goo Kim, Taehee Kim

AI总结:

本文研究了双切结的性质,定义了X-双切 genus,并展示了其在嵌入3维流形到4维流形中的应用,同时探讨了超切 genus和双稳定数的扩展及其可任意大的特性。

摘要:

对于一个位于3球面中的结K和一个单连通的闭4维流形X,我们定义了K的X-双切 genus,扩展了当X为4球面时的定义。我们证明对于每个整数n,存在一个代数上双切且ribbon的结K,其X-双切 genus大于n。我们的论证使用了新的L²签名障碍,用于将具有无限循环第一同调的闭3维流形嵌入具有无限循环基本群的闭4维流形中,以保持第一同调。我们还扩展了结的超切 genus的概念到单连通的4维流形,并证明存在双切结,其广义超切 genus可以任意大。此外,我们定义了结的双稳定数,扩展了Conway和Nagel引入的稳定数,并证明这个不变量也可以任意大。

英文摘要:

For a knot $K$ in the 3-sphere and a simply connected closed 4-manifold $X$, we define the $X$-double slice genus of $K$, extending the notion from the case when $X$ is the 4-sphere. We show that for each integer $n$, there exists an algebraically doubly slice and ribbon knot $K$ whose $X$-double slice genus is greater than $n$. Our arguments use new $L^2$-signature obstructions to embedding closed 3-manifolds with infinite cyclic first homology into closed 4-manifolds with infinite cyclic fundamental group, in a way that preserves first homology. We also extend the concept of the superslice genus of a knot to simply connected 4-manifolds and show that there exist doubly slice knots whose generalized superslice genera are arbitrarily large. Furthermore, we define the double stabilizing number of a knot, extending the stabilizing number introduced by Conway and Nagel, and show that this invariant can also be arbitrarily large.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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