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SUMMARY:Dmitri Nikshych (University of New Hampshire)
DTSTART:20230503T170000Z
DTEND:20230503T180000Z
DTSTAMP:20260423T035906Z
UID:TQFT/84
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/TQFT/84/">Wi
 tt groups of braided fusion categories and minimal non-degenerate extensio
 ns</a>\nby Dmitri Nikshych (University of New Hampshire) as part of Topolo
 gical Quantum Field Theory Club (IST\, Lisbon)\n\n\nAbstract\nThe symmetri
 c center of a braided category B consists of all objects of B having symme
 tric\nbraiding with every object of B. The categorical Witt group W(E) of 
 braided fusion categories with the same symmetric center E is obtained as 
  the quotient of the monoid of such categories by its submonoid consisting
  of Drinfeld centers. I will discuss the structure of this group and its r
 ole in the study of minimal non-degenerate extensions of braided categorie
 s. This theory has applications to the classification of braided fusion 2-
 categories (which\, in turn\,  lead to 4-dimensional TQFTs).\n\nNote unusu
 al time.\n
LOCATION:https://researchseminars.org/talk/TQFT/84/
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