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arXiv 1012.3745math.SGmath.GT
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关于过扭转切触结构中的纽结

On knots in overtwisted contact structures

John B. Etnyre

摘要:

我们证明了每一个过扭曲的切触结构的纽结类型是由无限多个不同的横向结都具有相同的自环绕数。在某些情况下,我们甚至可以对所有这些结进行分类。我们还显示了类似的结果,勒让德结,并证明了一个“民间”的结果,关于松散的横向和勒让德结(即结与overtwisted补充),这说,这种结是由他们的经典不变量(到contactomorphism)。最后,我们讨论了这些结果如何部分地填补了我们的理解的“地理”和“植物学”的问题,勒让德结在过扭曲的切触结构,以及许多悬而未决的问题,这些问题。

英文摘要:

We prove that each overtwisted contact structure has knot types that are represented by infinitely many distinct transverse knots all with the same self-linking number. In some cases, we can even classify all such knots. We also show similar results for Legendrian knots and prove a "folk" result concerning loose transverse and Legendrian knots (that is knots with overtwisted complements) which says that such knots are determined by their classical invariants (up to contactomorphism). Finally we discuss how these results partially fill in our understanding of the "geography" and "botany"' problems for Legendrian knots in overtwisted contact structures, as well as many open questions regarding these problems.

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