中文

变换群的高阶有界上同调

群论 2021-05-19 v1

摘要

对于紧黎曼流形MM,Brandenbursky与Marcinkowski构造了转移映射Hb(π1(M))Hb(Homeovol,0(M))H_b^*(\pi_1(M))\to H_b^*(Homeo_{vol,0}(M))并用其证明了对某些MM,空间EHb3(Homeovol,0(M))\overline{EH}_b^3(Homeo_{vol,0}(M))是无限维的。Kimura将这一论证适用于Diffvol(D2,D2)Diff_{vol}(D^2,\partial D^2)。我们将这两个结果推广到高阶EHb2n\overline{EH}_b^{2n}n1n\geq 1。我们还证明了对某些MM,普通上同调H(Homeovol,0(M))H^*(Homeo_{vol,0}(M))在所有阶上均非平凡。在我们的计算中,我们将转移映射视为由群耦合所诱导。

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引用

@article{arxiv.2105.08698,
  title  = {Higher-degree bounded cohomology of transformation groups},
  author = {Martin Nitsche},
  journal= {arXiv preprint arXiv:2105.08698},
  year   = {2021}
}