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arXiv 1707.01650math.GT
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关于纽结协调的一个注记

A Note on Knot Concordance

Eylem Zeliha Yildiz

摘要:

本文利用经典技巧回答了Daniele Celoria提出的关于任意闭$3$ -流形中纽结的几乎协调性的问题。我们首先证明了,给定$Y^3 \neq S^3$,对于任何非平凡元素$g\in π_1(Y)$,在解结的自由同伦类中存在无穷多个不同的光滑几乎协调类。特别是,我们认为这些不同的光滑几乎协调类的边界上的Mazur流形,我们没有这些不同的类边界的PL盘的Mazur流形,但所有的代表,我们构造的拓扑切片。我们还证明了$S^1 \times S^2$中$S^1 \times pt$的自由同伦类中的所有纽结都是光滑协调的。

英文摘要:

We use classical techniques to answer some questions raised by Daniele Celoria about almost-concordance of knots in arbitrary closed $3$-manifolds. We first prove that, given $Y^3 \neq S^3$, for any non-trivial element $g\in π_1(Y)$ there are infinitely many distinct smooth almost-concordance classes in the free homotopy class of the unknot. In particular we consider these distinct smooth almost-concordance classes on the boundary of a Mazur manifold and we show none of these distinct classes bounds a PL-disk in the Mazur manifold, but all the representatives we construct are topologically slice. We also prove that all knots in the free homotopy class of $S^1 \times pt$ in $S^1 \times S^2$ are smoothly concordant.

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