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SUMMARY:Jesse Wolfson (UC Irvine)
DTSTART:20210629T181500Z
DTEND:20210629T190500Z
DTSTAMP:20260413T060402Z
UID:zoomnovy/7
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/zoomnovy/7/"
 >Essential dimension via prismatic cohomology</a>\nby Jesse Wolfson (UC Ir
 vine) as part of Algebraic groups and algebraic geometry: in honor of Zino
 vy Reichstein's 60th birthday\n\n\nAbstract\nLet A be a complex abelian va
 riety.  Using prismatic cohomology\, we show that for all but finitely man
 y primes p\, the multiplication-by-p cover p:A\\to A is p-incompressible\,
  as conjectured by Brosnan. As an application\, we obtain new p-incompress
 ibility results for congruence covers of Shimura varieties\, extending pre
 vious work of Farb-Kisin-W\, Brosnan-Fakhruddin\, and Fakhruddin-Saini. Th
 is is joint work with Benson Farb and Mark Kisin.\n
LOCATION:https://researchseminars.org/talk/zoomnovy/7/
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