BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Michael Wemyss (University of Glasgow\, UK) DTSTART:20201029T120000Z DTEND:20201029T130000Z DTSTAMP:20260423T024757Z UID:LAGOON/16 DESCRIPTION:Title: Contraction algebras\, plumbings and flops\nby Michael Wemyss (Univers ity of Glasgow\, UK) as part of Longitudinal Algebra and Geometry Open ONl ine Seminar (LAGOON)\n\n\nAbstract\nI will explain how certain symmetric N akayama algebras (under the disguise of "contraction algebras") control an d prove theorems about geometric objects on both sides of mirror symmetry. As part of this\, I will explain our symplectic geometry model\, our alg ebraic geometry model\, and then how the contraction algebra relates them. The cohomology of objects in the underlying categories are naturally mod ules for the associated contraction algebra\, and I will explain how to us e this information to obtain otherwise tricky results\, such as a classifi cation of spherical (and more generally\, fat-spherical) objects. This ha s purely topological corollaries. One feature\, which I will probably glo ss over but is actually fundamental\, is that our categories have a depend ence on the characteristic of the ground field. This is joint work with I van Smith (arXiv:2010.10114).\n\nThursday 29th October 2020\, 12:00 – 13 :00 (GMT)\nhttps://us02web.zoom.us/j/89958893469?pwd=aWFWQXZnMXczUFdJc282b Wx3bE5Idz09\nMeeting ID: 899 5889 3469\nPasscode: Lagoon\n LOCATION:https://researchseminars.org/talk/LAGOON/16/ END:VEVENT END:VCALENDAR