English

Hyperbolic spaces that detect all strongly-contracting directions

Group Theory 2024-04-19 v1 Metric Geometry

Abstract

Given a geodesic metric space XX, we construct a corresponding hyperbolic space, which we call the contraction space, that detects all strongly contracting directions in the following sense; a geodesic in XX is strongly contracting if and only if its parametrized image in the contraction space is a quasi-geodesic. If a finitely generated group GG acts geometrically on XX, then all strongly-contracting elements act as WPD elements on the contraction space. If the space XX is CAT(0), or more generally Morse-dichotomous, that is if all Morse geodesics are strongly-contracting, then all generalized loxodromics act as WPD elements, implying that the action is what we call ``universally WPD''.

Keywords

Cite

@article{arxiv.2404.12162,
  title  = {Hyperbolic spaces that detect all strongly-contracting directions},
  author = {Stefanie Zbinden},
  journal= {arXiv preprint arXiv:2404.12162},
  year   = {2024}
}

Comments

27 pages, 5 figures. Comments welcome!

R2 v1 2026-06-28T15:58:42.253Z