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SUMMARY:Lucien Hennecart (The University of Edinburgh)
DTSTART:20231016T070000Z
DTEND:20231016T083000Z
DTSTAMP:20260422T155902Z
UID:HKUST-AG/18
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HKUST-AG/18/
 ">Cohomological integrality for 2-Calabi-Yau categories</a>\nby Lucien Hen
 necart (The University of Edinburgh) as part of Algebra and Geometry Semin
 ar @ HKUST\n\nLecture held in Room 5560.\n\nAbstract\nIn this talk\, I wil
 l explain how one can decompose the cohomology of moduli stacks of objects
  for a large class of 2-Calabi-Yau categories. Our main tools are cohomolo
 gical Hall algebras (CoHAs) and their associated BPS algebras (in their as
 sociative and Lie algebra versions). Important examples are given by repre
 sentations of preprojective algebras of quivers and finite length sheaves 
 on surfaces. In the latter case\, we can recover the generating series of 
 Betti numbers of the moduli stack in an efficient way.\n
LOCATION:https://researchseminars.org/talk/HKUST-AG/18/
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