English

Equivariant blowups of bounded parabolic points

Group Theory 2021-10-26 v3

Abstract

Let GG be a group acting by homeomorphisms on a Hausdorff compact space ZZ. We constructed a new space XX that blows up equivariantly the bounded parabolic points of ZZ. This means, roughly speaking, that GG acts by homeomorphisms on XX and there exists a continuous equivariant map π:XZ\pi: X \rightarrow Z such that for every non bounded parabolic point zZz \in Z, #π1(z)=1\#\pi^{-1}(z) = 1. We use such construction to characterize topologically some spaces that GG acts with the convergence property and to construct new convergence actions of GG from old ones. As one of the applications, if GG is a group and pp is a bounded parabolic point of the space of ends of GG, then the stabilizer of pp is one-ended.

Keywords

Cite

@article{arxiv.2008.05822,
  title  = {Equivariant blowups of bounded parabolic points},
  author = {Lucas H. R. de Souza},
  journal= {arXiv preprint arXiv:2008.05822},
  year   = {2021}
}

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50 pages