Semigroups, groups, and algebras of dynamical origin
Operator Algebras
2025-09-09 v1 Dynamical Systems
Group Theory
Abstract
The paper is an overview of recent results on algebraic structures (semigroups, groupoids, algebras, inverse semigroups, and groups) associated with objects with a rich set of partial symmetries. We discuss etale groupoids and inverse semigroups, Steinberg algebras, C*-algebras, topological full groups etc.. In particular, we describe in detail the main definitions and constructions related to contracting self-similar inverse semigroups. They are illustrated by several examples, including the semigroup generated by the golden mean rotation and the tiling semigroup of the Penrose tiling.
Cite
@article{arxiv.2509.05524,
title = {Semigroups, groups, and algebras of dynamical origin},
author = {Volodymyr Nekrashevych},
journal= {arXiv preprint arXiv:2509.05524},
year = {2025}
}
Comments
105 pages, 30 figures