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SUMMARY:Naomi Andrew (Southampton)
DTSTART:20220616T140500Z
DTEND:20220616T145500Z
DTSTAMP:20260423T003244Z
UID:GaTO/64
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GaTO/64/">Ba
 umslag-Solitar groups\, automorphisms and generalisations</a>\nby Naomi An
 drew (Southampton) as part of Geometry and topology online\n\n\nAbstract\n
 Baumslag-Solitar groups are a well known family in geometric group theory\
 , providing useful (counter)examples - such as groups that are Hopfian but
  not residually finite. Recently\, Ian Leary and Ashot Minasyan introduced
  a generalisation\, finding even more counterexamples - notably groups tha
 t are \\(\\CAT(0)\\) but not biautomatic. Outer automorphism groups of Bau
 mslag-Solitar groups range from finite to not even finitely generated\, wi
 th proofs (and re-proofs) across several authors and years.\n\nIn this tal
 k I will summarise (some) of what is known about the automorphisms of Baum
 slag-Solitar groups\, and the more modern\, Bass-Serre theoretic technique
 s that can be used to prove them. I'll then discuss my work with Sam Hughe
 s to extend these results to the automorphisms of Leary-Minasyan groups.\n
LOCATION:https://researchseminars.org/talk/GaTO/64/
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