BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Jonte Gödicke (Universität Hamburg) DTSTART:20250326T080000Z DTEND:20250326T093000Z DTSTAMP:20260422T161059Z UID:HKUST-AG/72 DESCRIPTION:Title: Multi-fusion categories from 2-Segal spaces\nby Jonte Gödicke (Univ ersität Hamburg) as part of Algebra and Geometry Seminar @ HKUST\n\nLectu re held in Room 3598 (Lift 27/28).\n\nAbstract\nIn the study of 3-dimensio nal Topological Quantum Field Theories (short TQFTs)\, certain monoidal ca tegories called multi-fusion categories are of fundamental importance. Wel l-known examples of these arise from finite groups through a linearization construction. However\, it is less well-known that the same construction can produce more interesting examples of monoidal structures from any 2-Se gal space. These include so-called Hall monoidal structures\, which are an ticipated to have interesting connections to quantum topology and TQFTs.\n \nIn this talk\, I will classify those 2-Segal spaces that induce multi-fu sion categories. For this\, I will introduce a 2-categorical characterizat ion of multi-fusion categories to translate questions about these monoidal structures to questions about homotopy coherent algebra in span categorie s. Afterwards\, I will discuss extensions of this to the context of derive d categories and derived TQFTs.\n LOCATION:https://researchseminars.org/talk/HKUST-AG/72/ END:VEVENT END:VCALENDAR