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SUMMARY:Francesco Sala (University of Pisa)
DTSTART:20250319T080000Z
DTEND:20250319T093000Z
DTSTAMP:20260422T155204Z
UID:HKUST-AG/71
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HKUST-AG/71/
 ">Cohomological Hall algebras of 1-dimensional sheaves and Yangians</a>\nb
 y Francesco Sala (University of Pisa) as part of Algebra and Geometry Semi
 nar @ HKUST\n\nLecture held in Room 3598 (Lift 27-28).\n\nAbstract\nThe fi
 rst part of this talk provides a brief and gentle introduction to the theo
 ry of 2-dimensional cohomological Hall algebras. The second part focuses o
 n the introduction of the nilpotent cohomological Hall algebra COHA(S\, Z)
  of coherent sheaves on a smooth quasi-projective complex surface S set-th
 eoretically supported on a closed subscheme Z. When S is the minimal resol
 ution of an ADE singularity and Z is the exceptional divisor\, I will desc
 ribe how to characterize COHA(S\, Z) via the Yangian of the corresponding 
 affine ADE quiver. This is a joint project with Emanuel Diaconescu\, Mauro
  Porta\, Oliver Schiffmann\, and Eric Vasserot.\n
LOCATION:https://researchseminars.org/talk/HKUST-AG/71/
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