BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Jonte Gödicke (Max-Plank-Institute for Mathematics) DTSTART:20260311T080000Z DTEND:20260311T093000Z DTSTAMP:20260422T161047Z UID:HKUST-AG/87 DESCRIPTION:Title: On a braided monoidal Hall 2-category\nby Jonte Gödicke (Max-Plank- Institute for Mathematics) as part of Algebra and Geometry Seminar @ HKUST \n\nLecture held in Room 3598 (Lift 27/28).\n\nAbstract\nAppearing in diff erent incarnations\, Hall algebras play an important role in classical rep resentation theory. Broadly speaking\, the Hall algebra construction assoc iates to an abelian category $A$ an algebra of functions on the moduli of objects $M(A)$ of $A$.\n\nThe goal of this talk is to describe a twofold c ategorification of the Hall algebra construction. This new construction as sociates to an abelian category $A$ a lax-braided monoidal 2-category of 2 -sheaves on $M(A)$. Even in the simplest case of the abelian category of v ector spaces\, this construction yields a rich and highly structured objec t. Focusing on this example\, I will explain the construction in detail an d describe why it is desirable from the perspective of categorified repres entation theory.\n\nThis is joint work with Quoc Ho\, Yang Hu\, and Walker Stern.\n LOCATION:https://researchseminars.org/talk/HKUST-AG/87/ END:VEVENT END:VCALENDAR