Poincaré profiles of groups and spaces

• David Hume ^[1] ; John M. Mackay ^[2] ; Romain Tessera ^[3]
  1. [1] University of Oxford

     University of Oxford

     Oxford District, Reino Unido

     
  2. [2] University of Bristol

     University of Bristol

     Reino Unido

     
  3. [3] Université Denis Diderot

     Université Denis Diderot

     París, Francia

     

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• Localización: Revista matemática iberoamericana, ISSN 0213-2230, Vol. 36, Nº 6, 2020, págs. 1835-1886
• Idioma: inglés
• DOI: 10.4171/rmi/1184
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• Resumen

  • 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.