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arXiv 0909.1434math.GT
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平凡环补中纽结的同伦、Delta-等价与协调

Homotopy, Delta-equivalence and concordance for knots in the complement of a trivial link

Thomas Fleming, Tetsuo Shibuya, Tatsuya Tsukamoto, Akira Yasuhara

摘要:

链同伦和自Delta等价是链上的等价关系。这是由J.米尔诺(resp。Milnor不变量决定了一个链接是否是链接同伦的(分别是自Delta等价)到平凡链接。研究了环的某个分支上的环同伦和自Delta等价,即在环的补上的纽结的同伦和Delta等价。我们证明了Milnor不变量决定了平凡环的补链中的纽结是否是零同伦的,并给出了这种纽结与平凡纽结是Delta等价的充分条件.我们还给出了平凡纽结的补中的纽结等价到Delta-等价和协调的一个充分条件。

英文摘要:

Link-homotopy and self Delta-equivalence are equivalence relations on links. It was shown by J. Milnor (resp. the last author) that Milnor invariants determine whether or not a link is link-homotopic (resp. self Delta-equivalent) to a trivial link. We study link-homotopy and self Delta-equivalence on a certain component of a link with fixing the rest components, in other words, homotopy and Delta-equivalence of knots in the complement of a certain link. We show that Milnor invariants determine whether a knot in the complement of a trivial link is null-homotopic, and give a sufficient condition for such a knot to be Delta-equivalent to the trivial knot. We also give a sufficient condition for knots in the complements of the trivial knot to be equivalent up to Delta-equivalence and concordance.

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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