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SUMMARY:Isogenies of Elliptic Curves over Function Fields
DTSTART:20230413T141500
DTEND:20230413T154500
DTSTAMP:20260408T092623Z
UID:193f67ce4e3a253d477ab1d74be524cabc17ddb2a01cb44af2289c78
CATEGORIES:Conferences - Seminars
DESCRIPTION:Richard Griffon (Université Clermont-Auvergne)\nIn this talk\
 , we will first review the construction of cohomological DT invariants\, a
  kind of virtual cohomology for moduli spaces of sheaves on Calabi-Yau thr
 eefolds. We will explain their construction by Brav\, Bussi\, Dupont\, Joy
 ce\, and Szendroï\, using perverse sheaves of vanishing cycles.\nWe will 
 then present a toric localization formula for these invariants\, which can
  be seen as a virtual version of the Bialinicky-Birula decomposition. The 
 proof of this formula uses in a crucial way the formalism of hyperbolic lo
 calization and its interaction with perverse sheaves.
LOCATION:MA A3 30 https://plan.epfl.ch/?room==MA%20A3%2030
STATUS:CONFIRMED
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