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SUMMARY:Coarse separation in hyperbolic groups and RAAG's - Romain Tessera
  (Université Paris Saclay)
DTSTART:20250708T130000Z
DTEND:20250708T140000Z
UID:TALK232825@talks.cam.ac.uk
DESCRIPTION:In a joint work with Bensaid and Genevois\, we characterize am
 ong a vast class of groups those which can be coarsely separated by subset
 s of subexponential growth. For instance\, we prove that such a hyperbolic
  group must virtually split over a cyclic group\, or that the defining gra
 ph of such a RAAG must be separated by a clique. Our notion of coarse sepa
 ration arises from the study of coarse embeddings into wreath products H\\
 wr G with lamp group&nbsp\;H of subexponential growth or into amalgamated 
 products over non-distorted subgroups of subexponential growth.
LOCATION:Seminar Room 1\, Newton Institute
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