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UID:20250730T063306EDT-1454AI4wsJ@132.216.98.100
DTSTAMP:20250730T103306Z
DESCRIPTION:Title: Acylindrical actions on trees and applications to the ou
 ter automorphism group of Baumslag-Solitar groups\n\nAbstract: An acylindr
 ical action generalizes proper and cobounded actions on hyperbolic spaces.
  Non-elementary acylindrical actions provide acylindrically hyperbolic gro
 ups\, which includes most mapping class groups of punctured surfaces\, 3-m
 anifold groups\, and Out(F_n) for n > 1. In this talk\, we will explore ho
 w acylindricity of a group action on a tree can be preserved under quotien
 ts by certain subgroups\, and discuss the existence of a largest acylindri
 cal action for some groups acting on trees. In addition\, we will show whe
 n Out(BS(p\,q)) is acylindrically hyperbolic for non-solvable Baumslag-Sol
 itar groups\, despite BS(p\,q) itself not being acylindrically hyperbolic\
 , and explore further applications of these acylindricity results. This is
  a joint work with Daxun Wang.\n\n \n\nAfter the talk we will gather in th
 e lounge for tea and snacks and then we will have dinner with Bratati.\n
DTSTART:20241120T210000Z
DTEND:20241120T220000Z
LOCATION:Room 920\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Bratati Som (University at Buffalo-SUNY)
URL:/mathstat/channels/event/bratati-som-university-bu
 ffalo-suny-361265
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