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arXiv · 1310.7753

Quasi-convexity of hyperbolically embedded subgroups

Alessandro Sisto
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Abstract

We show that any infinite order element $g$ of a virtually cyclic hyperbolically embedded subgroup of a group $G$ is Morse, that is to say any quasi-geodesic connecting points in the cyclic group $C$ generated by $g$ stays close to $C$. This answers a question of Dahmani-Guirardel-Osin. What is more, we show that hyperbolically embedded subgroups are quasi-convex. Finally, we give a definition of what it means for a collection of subspaces of a metric space to be hyperbolically embedded and we show that axes of pseudo-Anosovs are hyperbolically embedded in Teichmüller space endowed with the Weil-Petersson metric.

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Alessandro Sisto. 2013-10-29. Quasi-convexity of hyperbolically embedded subgroups. https://arxiv.org/abs/1310.7753

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