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SUMMARY:Otto Overkamp (Leibniz Universität Hannover)
DTSTART:20210121T130000Z
DTEND:20210121T140000Z
DTSTAMP:20260423T005759Z
UID:AGNTISTA/26
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/AGNTISTA/26/
 ">Néron models of pseudo-Abelian varieties</a>\nby Otto Overkamp (Leibniz
  Universität Hannover) as part of Algebraic Geometry and Number Theory se
 minar - ISTA\n\n\nAbstract\nWe explain Totaro's notion of pseudo-Abelian v
 arieties and show that they admit Néron models over excellent discrete va
 luation rings. As a next step\, we study those Néron models and generaliz
 e the notions of good reduction and semiabelian reduction to such algebrai
 c groups.  \nWe prove that the well-known representation-theoretic criteri
 a for good and semiabelian reduction due to Néron-Ogg-Shafarevich and Gro
 thendieck carry over to the pseudo-Abelian case\, and give examples to sho
 w that our results are the best possible in most cases.\n
LOCATION:https://researchseminars.org/talk/AGNTISTA/26/
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