Monoids, their boundaries, fractals and $C^\ast$-algebras
Abstract
In this note we establish some connections between the theory of self-similar fractals in the sense of John E. Hutchinson (cf. [3]) and the theory of boundary quotients of -algebras associated to monoids. Although we must leave several important questions open, we show that the existence of self-similar M-fractals for a given monoid M, gives rise to examples of - algebras generalizing the boundary quotients discussed by X. Li in [4, {\S}7, p. 71]. The starting point for our investigations is the observation that the universal boundary of a finitely 1-generated monoid carries naturally two topologies. The fine topology plays a prominent role in the construction of these boundary quotients. On the other hand, the cone topology can be used to define canonical measures on the attractor of an M-fractal provided M is finitely 1-generated.
Cite
@article{arxiv.1903.04716,
title = {Monoids, their boundaries, fractals and $C^\ast$-algebras},
author = {Giulia dal Verme and Thomas Weigel},
journal= {arXiv preprint arXiv:1903.04716},
year = {2019}
}