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SUMMARY:Profinite rigidity among free-by-(finite cyclic) groups - Paweł P
 iwek\, University of Oxford
DTSTART:20231110T160000Z
DTEND:20231110T170000Z
UID:TALK204298@talks.cam.ac.uk
CONTACT:Alexis Marchand
DESCRIPTION:Distinguishing groups by their finite quotients (i.e. profinit
 e rigidity) has been an active area of research. In the talk\, I will expl
 ain a recent result in this spirit concerning groups with a f.g. free norm
 al subgroup giving a finite cyclic quotient. The proof relies a lot on Bas
 s-Serre theory.\nThe result also implies that free-by-cyclic groups define
 d by automorphisms which have finite order in Out(Fn) are distinguished (u
 p to isomorphism) by their finite quotients.\nThis is joint work with Mart
 in Bridson.
LOCATION:MR13
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