We provide sharp conditions under which a collection of separators A of a connected topological space Z leads to a canonical R-tree T. Any group acting on Z by homeomorphisms will act by homeomorphisms on T.(c) 2022 Elsevier B.V. All rights reserved.
机构:
Universite Paul Sabatier, Lab E Picard, UMR 5580, F-31062 Toulouse, FranceUniversite Paul Sabatier, Lab E Picard, UMR 5580, F-31062 Toulouse, France