English

Actions of maximal growth of hyperbolic groups

Group Theory 2012-02-09 v2

Abstract

We prove that every non-elementary hyperbolic group GG acts with maximal growth on some set XX such that every orbit of any element gGg \in G is finite. As a side-product of our approach we prove that if GG is non-elementary hyperbolic, \HHG\HH \leq G is quasiconvex of infinite index then there exists gGg \in G such that <\HH,g><\HH,g> is quasiconvex of infinite index and is isomorphic to \HH<g>\HH*<g > if and only if \HHE(G)={e}\HH \cap E(G)= \{e\} , where E(G)E(G) is the maximal finite normal subgroup of GG.

Keywords

Cite

@article{arxiv.1201.1349,
  title  = {Actions of maximal growth of hyperbolic groups},
  author = {Vladimir Chaynikov},
  journal= {arXiv preprint arXiv:1201.1349},
  year   = {2012}
}

Comments

19 pages, 2 figures