BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Xavier Roulleau (University of Aix-Marseille) DTSTART:20200521T110000Z DTEND:20200521T120000Z DTSTAMP:20260423T052930Z UID:ZAG/13 DESCRIPTION:Title: On the geometric models of K3 surfaces with finite automorphism group and Pic ard number larger than two\nby Xavier Roulleau (University of Aix-Mars eille) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nVin berg and Nikulin classified K3 surfaces which have finite automorphism gro up and Picard number 4 and 3\,5\,..\,19 respectively. That classification is lattice theoretic\, according to the Neron-Severi group of these surfac es\; there are 118 such lattices. In this talk I will discuss on the geome tric construction of these surfaces (by double coverings or complete inter sections) and describe their (finite) set of (-2)-curves\, which gives the ample cone. Most of the moduli spaces of these K3 surfaces are unirationa l. A part of this talk is based on a joint work with Michela Artebani and Claudia Correa Diesler.\n LOCATION:https://researchseminars.org/talk/ZAG/13/ END:VEVENT END:VCALENDAR