Metric Spaces of Arbitrary Finitely-Generated Scaling Group

Abstract

For a metric space $X$ with a compatible measure $\mu$, Genevois and Tessera defined the Scaling Group of $(X,\mu )$ as the subgroup $\Gamma$ of ${\mathbb{R}}_{>0}$ of positive real numbers $\gamma$ for which there are quasi-isometries of $X$ coarsely scaling $\mu$ by a factor of $\gamma$. We show that for any finitely generated subgroup $\Gamma$ of ${\mathbb{R}}_{>0}$ there exists a space $N_{\Gamma }$, bi-Lipschitz equivalent to a graph of finite degree, with scaling group $\Gamma$.

arXiv comment29 pages, 4 figures