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arXiv 0904.1876math.ATmath.GRmath.GT
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关于三维流形的有限基本群的上同调的注记

Remarks on the cohomology of finite fundamental groups of 3-manifolds

Satoshi Tomoda, Peter Zvengrowski

摘要:

基于显式4-周期分解,给出了已知自由作用在S ^3上的有限群G的上同调,以及相应的3-流形(球面空间型)M = S ^3/G的上同调环的计算。链近似的对角线构造,并明确的收缩同伦也构造的情况下G是一个广义四元数群,二元四面体群,或二元八面体群。一些应用程序进行了简要讨论。

英文摘要:

Computations based on explicit 4-periodic resolutions are given for the cohomology of the finite groups G known to act freely on S^3, as well as the cohomology rings of the associated 3-manifolds (spherical space forms) M = S^3/G. Chain approximations to the diagonal are constructed, and explicit contracting homotopies also constructed for the cases G is a generalized quaternion group, the binary tetrahedral group, or the binary octahedral group. Some applications are briefly discussed.

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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