Poincaré profiles of groups and spaces
David Hume
University of Oxford, UKJohn M. Mackay
University of Bristol, UKRomain Tessera
Université Paris Diderot, France
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Abstract
We introduce a spectrum of monotone coarse invariants for metric measure spaces called Poincaré profiles. The two extremes of this spectrum determine the growth of the space, and the separation profile as defined by Benjamini–Schramm–Timár. In this paper we focus on properties of the Poincaré profiles of groups with polynomial growth, and of hyperbolic spaces, where we deduce a connection between these profiles and conformal dimension. As applications, we use these invariants to show the non-existence of coarse embeddings in a variety of examples.
Cite this article
David Hume, John M. Mackay, Romain Tessera, Poincaré profiles of groups and spaces. Rev. Mat. Iberoam. 36 (2020), no. 6, pp. 1835–1886
DOI 10.4171/RMI/1184