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X-WR-CALNAME:Algebraic and Symplectic Geometry Seminar
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DTSTART:20250821T044320
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DTSTART:20261020T184704
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DTSTART:20250827T114320
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BEGIN:VEVENT
UID:83334
DTSTART;TZID=UTC:20261021T083000
SEQUENCE:0
TRANSP:TRANSPARENT
LOCATION:Exceptionally\, this seminar will take place in Classroom C2.
SUMMARY:ADHM Bundles and counting surfaces in Calabi--Yau fourfolds
CLASS:PUBLIC
DESCRIPTION:Abstract \n\nThe recent seminal work by Bae\, Kool and Park est
 ablishes a DT type\ntheory counting surfaces in Calabi--Yau fourfolds. I w
 ill present on\njoint work with R. Szabo on computing a variant of surface
  counts on\nCY4s using Diaconescu--Piazzalunga's technology of ADHM Bundle
 s and\nCoulomb branch localization on a smooth\, toric\, projective surfac
 e.\n \nWe compute these enumerative invariants by computing the partition
 \nfunction of a topologically twisted Gauge theory similar in nature to\nV
 afa--Witten's twist of 4d N=4 SYM. \n  
DTSTAMP:20261020T184704Z
END:VEVENT
BEGIN:VEVENT
UID:81898
DTSTART;TZID=UTC:20261027T153000
SEQUENCE:0
TRANSP:TRANSPARENT
LOCATION:L4
SUMMARY:Coproducts on 3d CoHAs
CLASS:PUBLIC
DESCRIPTION:Abstract \n\nIn this talk I will discuss different types of cop
 roducts on\ncohomological Hall algebras associated to 3-Calabi-Yau catego
 ries\, as\nrecently defined by Kinjo-Park-Safronov and Descombes. In gener
 al\,\nthese are actually a more exotic structure we call a vertex coproduc
 t.\nI will explain the important special case of a quiver with potential.
 \nIn this case\, these coproducts are related to deformed Drinfeld\ncoprod
 ucts on Yangians. I will also discuss how vertex coproducts are\nrelated 
 to factorization type coproducts\, recently defined in work of\nDavison-He
 nnecart-Kinjo-Schiffmann-Vasserot. This is joint work with\nJindal and Lat
 yntsev and work in progress with Latyntsev and\nDescombes.\n 
DTSTAMP:20261020T184704Z
END:VEVENT
BEGIN:VEVENT
UID:81946
DTSTART;TZID=UTC:20261103T153000
SEQUENCE:0
TRANSP:TRANSPARENT
LOCATION:L4
SUMMARY:TBA
CLASS:PUBLIC
DTSTAMP:20261020T184704Z
END:VEVENT
BEGIN:VEVENT
UID:82065
DTSTART;TZID=UTC:20261110T153000
SEQUENCE:0
TRANSP:TRANSPARENT
LOCATION:L4
SUMMARY:TBA
CLASS:PUBLIC
DTSTAMP:20261020T184704Z
END:VEVENT
BEGIN:VEVENT
UID:81848
DTSTART;TZID=UTC:20261117T153000
SEQUENCE:0
TRANSP:TRANSPARENT
LOCATION:L4
SUMMARY:TBA
CLASS:PUBLIC
DTSTAMP:20261020T184704Z
END:VEVENT
BEGIN:VEVENT
UID:82084
DTSTART;TZID=UTC:20261124T153000
SEQUENCE:0
TRANSP:TRANSPARENT
LOCATION:L4
SUMMARY:TBA
CLASS:PUBLIC
DTSTAMP:20261020T184704Z
END:VEVENT
BEGIN:VEVENT
UID:81945
DTSTART;TZID=UTC:20261201T153000
SEQUENCE:0
TRANSP:TRANSPARENT
LOCATION:L4
SUMMARY:TBA
CLASS:PUBLIC
DTSTAMP:20261020T184704Z
END:VEVENT
BEGIN:VEVENT
UID:83335
DTSTART;TZID=UTC:20261208T153000
SEQUENCE:0
TRANSP:TRANSPARENT
SUMMARY:TBA
CLASS:PUBLIC
DTSTAMP:20261020T184704Z
END:VEVENT
BEGIN:VEVENT
UID:82088
DTSTART;TZID=UTC:20270209T153000
SEQUENCE:0
TRANSP:TRANSPARENT
LOCATION:L4
SUMMARY:TBA
CLASS:PUBLIC
DTSTAMP:20261020T184704Z
END:VEVENT
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