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arXiv 0708.2085math.GTmath.AT
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exp_3(S^1)的双曲逼近

A hyperbolic approach to exp_3(S^1)

S. C. F. Rose

摘要:

本文研究了一种新的几何方法来研究不超过k的基数圆的所有非空子集的集合exp_k(S^1)。通过把圆看作双曲平面的边界,我们能够利用它的等距群来明确地确定它的前几个位形空间的结构。然后我们研究了这些构形空间如何在它们的并集exp_3(S^1)中相互配合,从而重新证明了Bott的一个旧定理,并给出了一个新的证明(继E. Shchepin)的事实,exp_1(S^1)到exp_3(S^1)的嵌入是三叶结。

英文摘要:

In this paper we investigate a new geometric method of studying exp_k(S^1), the set of all non-empty subsets of the circle of cardinality at most k. By considering the circle as the boundary of the hyperbolic plane we are able to use its group of isometries to determine explicitely the structure of its first few configuration spaces. We then study how these configuration spaces fit together in their union, exp_3(S^1), to reprove an old theorem of Bott as well as to offer a new proof (following that of E. Shchepin) of the fact that the embedding exp_1(S^1) into exp_3(S^1) is the trefoil 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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