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arXiv math/0105139math.GT
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三维流形中的框架纽结与仿射自环绕数

Framed knots in 3-manifolds and affine self-linking numbers

Vladimir Chernov

摘要:

对应于给定的非框架结$K\subset S^3$的非同位素框架结的数目$|K|$是无限的。这是由于零同调框架结的自连接数$\slk$的存在.我们使用Vassiliev-Goussarov不变量的方法来构造“仿射自环绕数”,它们是$\slk$到非零同调框架结的扩展。作为一个推论,我们得到,$|K|=\infty$的所有节点在一个定向(不一定是紧的)3-流形$M$,是不能实现为一个连接和$(S^1\times S^2) # M'$。紧致流形的这个结果首先由Hoste和Przytycki提出。他们提到的作品麦卡洛的想法的证明,但据我们所知,证明这一基本事实是没有文学。我们的证明是基于不同的想法。对于$M=(S^1\times S^2) # M'$,我们在$M$中构建$K$,使得$|K|=2\neq \infty$ .

英文摘要:

The number $|K|$ of non-isotopic framed knots that correspond to a given unframed knot $K\subset S^3$ is infinite. This follows from the existence of the self-linking number $\slk$ of a zerohomologous framed knot. We use the approach of Vassiliev-Goussarov invariants to construct ``affine self-linking numbers'' that are extensions of $\slk$ to the case of nonzerohomologous framed knots. As a corollary we get that $|K|=\infty$ for all knots in an oriented (not necessarily compact) 3-manifold $M$ that is not realizable as a connected sum $(S^1\times S^2) # M'$. This result for compact manifolds was first stated by Hoste and Przytycki. They referred to the works of McCullough for the idea of the proof, however to the best of our knowledge the proof of this fundamental fact was not given in literature. Our proof is based on different ideas. For $M=(S^1\times S^2) # M'$ we construct $K$ in $M$ such that $|K|=2\neq \infty$.

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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