BEGIN:VCALENDAR
VERSION:2.0
PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Thomas Krämer (Humboldt Universität zu Berlin)
DTSTART:20210219T140000Z
DTEND:20210219T150000Z
DTSTAMP:20260423T010754Z
UID:GPL/10
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/GPL/10/">Sem
 icontinuity of Gauss maps and the Schottky problem</a>\nby Thomas Krämer 
 (Humboldt Universität zu Berlin) as part of Geometry and Physics @ Lisbon
 \n\n\nAbstract\nWe show that the degree of the Gauss map for subvarieties 
 of abelian varieties is semicontinuous in families\, and we discuss its ju
 mp loci. In the case of theta divisors this gives a finite stratification 
 of the moduli space of ppav's whose strata include the Torelli locus and t
 he Prym locus. More generally we obtain semicontinuity results for the int
 ersection cohomology of algebraic varieties with a finite morphism to an a
 belian variety\, leading to a topological interpretation for various jump 
 loci in algebraic geometry. \n\nThis is joint work with Giulio Codogni.\n
LOCATION:https://researchseminars.org/talk/GPL/10/
END:VEVENT
END:VCALENDAR