The rates of growth in an acylindrically hyperbolic group

arXiv2103.01430MaRDI QIDQ6361892

Koji Fujiwara

Publication date: 1 March 2021

Abstract: Let $G$ be an acylindrically hyperbolic group on a $delta$-hyperbolic space $X$. Assume there exists $M$ such that for any finite generating set $S$ of $G$, the set $S^M$ contains a hyperbolic element on $X$. Suppose that $G$ is equationally Noetherian. Then we show the set of the growth rates of $G$ 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 $3$-manifold except for the case that the manifold has Sol-geometry (Theorem 5.7).

Mathematics Subject Classification ID

Geometric group theory (20F65)

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