English

The rates of growth in an acylindrically hyperbolic group

Group Theory 2023-06-12 v3

Abstract

Let GG be an acylindrically hyperbolic group on a δ\delta-hyperbolic space XX. Assume there exists MM such that for any finite generating set SS of GG, the set SMS^M contains a hyperbolic element on XX. Suppose that GG is equationally Noetherian. Then we show the set of the growth rates of GG is well-ordered (Theorem 1.1). The conclusion was known for hyperbolic groups, and this is a generalization. Our result applies to all lattices in simple Lie groups of rank-1 (Theorem 1.3), and more generally, some family of relatively hyperbolic groups (Theorem 1.2). It also applies to the fundamental group, of exponential growth, of a closed orientable 33-manifold except for the case that the manifold has Sol-geometry (Theorem 5.7).

Keywords

Cite

@article{arxiv.2103.01430,
  title  = {The rates of growth in an acylindrically hyperbolic group},
  author = {Koji Fujiwara},
  journal= {arXiv preprint arXiv:2103.01430},
  year   = {2023}
}

Comments

Definition of WPD is changed (Definition 2.1). Lemma 2.4 on WPD is added. Application to 3-manifold groups is added (Section 5.4). The statement of Theorem 7.1 and Proposition 7.2 are changed. Proof of Lemma 7.4 is changed containing more details