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SUMMARY:Paul Henry-Leemann (University of Neuchatel)
DTSTART:20210222T073000Z
DTEND:20210222T083000Z
DTSTAMP:20260423T021403Z
UID:SiN/14
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/SiN/14/">Cay
 ley graphs with few automorphisms</a>\nby Paul Henry-Leemann (University o
 f Neuchatel) as part of Symmetry in Newcastle\n\n\nAbstract\nLet G be a gr
 oup and S a generating set. Then the group G naturally acts on the Cayley 
 graph Cay(G\,S) by left multiplications. The group G is said to be rigid i
 f there exists an S such that the only automorphisms of Cay(G\,S) are the 
 ones coming from the action of G.\nWhile the classification of finite rigi
 d groups was achieved in 1981\, few results were known about infinite grou
 ps. In a recent work\, with M. de la Salle we gave a complete classificati
 on of infinite finitely generated rigid groups. As a consequence\, we also
  obtain that every finitely generated group admits a Cayley graph with cou
 ntable automorphism group.\n
LOCATION:https://researchseminars.org/talk/SiN/14/
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