BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Karin Baur (University of Leeds) DTSTART:20210317T131500Z DTEND:20210317T141500Z DTSTAMP:20260423T041032Z UID:AarHomAlg/3 DESCRIPTION:Title: Orbifold diagrams and skew group categories\nby Karin Baur (Universi ty of Leeds) as part of Aarhus Homological Algebra Seminar\n\n\nAbstract\n Alternating strand diagrams (as introduced by Postnikov) on the disk have been used in the study of the coordinate ring of the Grassmannian. In part icular\, they give rise to clusters of the Grassmannian cluster algebras ( Scott) or to cluster-tilting objects of the Grassmannian cluster categorie s of Jensen-King-Su (Baur-King-Marsh). On the other hand\, orbifolds have also been related to cluster structures as Paquette-Schiffler (or Chekhov- Shapiro for a geometric approach). Here we introduce orbifold diagrams as quotients of symmetric Postnikov diagrams and show how to associate quiver s with potentials to them. This is joint work with Andrea Pasquali (Stuttg art) and Diego Velasco (Cali).\n LOCATION:https://researchseminars.org/talk/AarHomAlg/3/ END:VEVENT END:VCALENDAR