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arXiv math/0012118math.GT
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经典纽结的协边性

Grope cobordism of classical knots

Jim Conant, Peter Teichner

摘要:

我们解释了一个3-流形中的两个纽结之间的摸索配边的概念。每一个组配边都有一个类型,可以用一个有根的单价树来描述。通过以不同的方式过滤这些树,我们展示了如何Goussarov-Habiro方法的有限型不变量的结是密切相关的,我们的概念摸索cobordism。因此,我们的结果可以看作是有限型不变量的几何解释。我们研究的一个有趣的加细是3-空间中的纽结模对称群配边。这个理论一方面映射到通常的Vassiliev理论,另一方面它映射到结协调群的Cochran-Orr-Teichner过滤,通过4-空间中的对称搜索协边。特别是,分次理论包含了有限型不变量(h度项映射到瓦西里耶夫度2^h)、h = 2时的Blanchfield形式或S-等价、h = 3时的Casson-Gordon不变量,以及h = 4时的纽结的新冯诺依曼签名。

英文摘要:

We explain the notion of a grope cobordism between two knots in a 3-manifold. Each grope cobordism has a type that can be described by a rooted unitrivalent tree. By filtering these trees in different ways, we show how the Goussarov-Habiro approach to finite type invariants of knots is closely related to our notion of grope cobordism. Thus our results can be viewed as a geometric interpretation of finite type invariants. An interesting refinement we study are knots modulo symmetric grope cobordism in 3-space. On one hand this theory maps onto the usual Vassiliev theory and on the other hand it maps onto the Cochran-Orr-Teichner filtration of the knot concordance group, via symmetric grope cobordism in 4-space. In particular, the graded theory contains information on finite type invariants (with degree h terms mapping to Vassiliev degree 2^h), Blanchfield forms or S-equivalence at h=2, Casson-Gordon invariants at h=3, and for h=4 one has the new von Neumann signatures of a knot.

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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