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arXiv math/0606220math.GT
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S^3在同调球中的一个刻画

A characterisation of S^3 among homology spheres

Michel Boileau, Luisa Paoluzzi, Bruno Zimmermann

摘要:

我们证明了一个整同调3-球面是S^3当且仅当它允许四个奇素数阶的周期同同态,其轨道空间是S^3。作为应用,我们证明了一个非S^3的不可约整同调球面是S^3中至多有4个纽结的奇素数级循环分支覆盖。还得到了作用在整同调球面上的奇阶有限群的结构的一个结果。

英文摘要:

We prove that an integral homology 3-sphere is S^3 if and only if it admits four periodic diffeomorphisms of odd prime orders whose space of orbits is S^3. As an application we show that an irreducible integral homology sphere which is not S^3 is the cyclic branched cover of odd prime order of at most four knots in S^3. A result on the structure of finite groups of odd order acting on integral homology spheres is also obtained.

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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