Year: 2026
Type: preprint
Abstract: We prove that every bounded-to-one action of a finitely generated commutative monoid has asymptotic dimension at most the torsion-free rank of its group completion, with control uniform for a fixed monoid, generating set, and generator fiber bound. The estimate is sharp. Together with the equality of classical and Borel asymptotic dimensions for these actions, it gives the sharp Borel rank bound and recovers hyperfiniteness for bounded-to-one Borel actions of countable commutative monoids.
Source: arXiv (Cornell University)
Authors: Wang, Jinmin, Yu, Jing, Zhu, Jingming
Institution: Chinese Academy of Sciences
Language: English
Subfield: Geometry and Topology
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
Awards: G2020760453, G3232727503, G480876040
OpenAlex ID: W7214159718