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SUMMARY:Junior Geometry Seminar – Gabriel Corrigan (Glasgow)
DESCRIPTION:Title: Gauss diagrams\, symmetric automorphisms\, and configura
 tion spaces\nSpeaker: Gabriel Corrigan (Glasgow)\n\n\n\n\n\n\nAbstract: Th
 e purpose of this talk is to trace a story linking a topological problem t
 o some combinatorial gadgets called Gauss diagrams. The problem is to unde
 rstand the geometry and topology of some configuration spaces\, and I’d 
 like to advertise Gauss diagrams as I’ve been finding them very useful w
 hen working on this problem: they are very efficient at encoding certain t
 opological data. The story will go via various species of braid group and 
 involves so-called ‘symmetric’ automorphisms of free groups. If I have
  time\, I’ll then talk about recent work in which I introduce Gauss diag
 ram-like objects to handle symmetric automorphisms of right-angled Artin g
 roups (RAAGs)\, which are a class of groups well-studied by geometric grou
 p theory. This allows us to give a new proof of a known presentation of th
 e symmetric automorphism group of any RAAG\, and a diagrammatic incarnatio
 n of that group.\n\n\n\n\n\n\n\n \n\n\n\n\nSome snacks will be provided b
 efore and after the talk.\nGo to the seminar main page.\nSubscribe to the 
 mailing list.\n
URL:https://www.imperial.ac.uk/events/209148/junior-geometry-seminar-gabrie
 l-corrigan/
DTSTART;TZID=Europe/London:20260501T173000
DTEND;TZID=Europe/London:20260501T183000
LOCATION:Room 140\, Huxley Building\, South Kensington Campus\, Imperial Co
 llege London\, London\, SW7 2AZ\, United Kingdom
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