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SUMMARY:Christian Schnell (Stony Brook University)
DTSTART:20210907T090000Z
DTEND:20210907T100000Z
DTSTAMP:20260423T021417Z
UID:ZAG/144
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ZAG/144/">A 
 new finiteness theorem for variations of Hodge structure</a>\nby Christian
  Schnell (Stony Brook University) as part of ZAG (Zoom Algebraic Geometry)
  seminar\n\n\nAbstract\nI will talk about a new finiteness theorem for var
 iations of Hodge structure. It is a generalization of the Cattani-Deligne-
 Kaplan theorem from Hodge classes to so-called self-dual (and anti-self-du
 al) classes. For example\, among integral cohomology classes of degree 4\,
  those of type (4\,0) + (2\,2) + (0\,4) are self-dual\, and those of type 
 (3\,1) + (1\,3) are anti-self-dual. The result is suggested by considerati
 ons in theoretical physics\, and the proof uses o-minimality and the defin
 ability of period mappings. This is joint work with Benjamin Bakker\, Thom
 as Grimm\, and Jacob Tsimerman.\n
LOCATION:https://researchseminars.org/talk/ZAG/144/
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