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SUMMARY:Valentina Harizanov (George Washington University)
DTSTART:20210506T180000Z
DTEND:20210506T190000Z
DTSTAMP:20260423T052930Z
UID:OLS/50
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/OLS/50/">Com
 putability theory and automorphisms of lattices of substructures</a>\nby V
 alentina Harizanov (George Washington University) as part of Online logic 
 seminar\n\n\nAbstract\nWe use computability-theoretic concepts and methods
  to study automorphisms of lattices of substructures of a canonical comput
 able infinite-dimensional vector space over the rationals. In particular\,
  we establish the equivalence of the embedding relation for certain automo
 rphism groups with the order relation of the corresponding Turing degrees.
  We further determine the Turing degrees of these automorphism groups. We 
 establish similar results for the interval Boolean algebra over the ration
 als. This is joint work with Rumen Dimitrov and Andrei Morozov.\n
LOCATION:https://researchseminars.org/talk/OLS/50/
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