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SUMMARY:Sorin Popa (UCLA)
DTSTART:20210608T160000Z
DTEND:20210608T165000Z
DTSTAMP:20260423T004516Z
UID:Opalg21/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/Opalg21/2/">
 On the rigidity of virtual symmetries of II_1 factors</a>\nby Sorin Popa (
 UCLA) as part of Conference on operator algebras and related topics in Ist
 anbul\, 2021\n\n\nAbstract\nOne of the most fascinating aspects in the ana
 lysis of non-commutative spaces (aka von Neumann algebras)\, is the way th
 eir building data\, which is often geometric in nature\, impacts on their 
 generalized (or virtual) symmetry picture. This is particularly the case f
 or II_1 factors\, where virtual symmetries are encoded by subfactors of fi
 nite Jones index\, a numerical invariant that can be quantized in intrigui
 ng ways. I will discuss some results and open problems that illustrate the
  unique interplay between analysis and algebra/combinatorics entailed by t
 his interdependence\, that's specific to subfactor theory.\n
LOCATION:https://researchseminars.org/talk/Opalg21/2/
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