BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Alexander Polishchuk (University of Oregon) DTSTART:20200623T170000Z DTEND:20200623T180000Z DTSTAMP:20260423T021451Z UID:ZAG/25 DESCRIPTION:Title: Hyp erelliptic limits of quadrics through canonical curves and the super-Schot tky locus\nby Alexander Polishchuk (University of Oregon) as part of Z AG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nI will describe joint works with Eric Rains and with Giovanni Felder and David Kazhdan. The firs t part will be about a classical topic of quadrics through canonically emb edded curves. We study limiting quadrics as canonical curves approach a hy perelliptic limit. There is a surprizingly simple description of all such limits. I will also discuss the connection to ribbon curves (which are thi ckenings of rational normal curves) and to the blow up of the moduli space of curves at the hyperelliptic locus. In the second part I will talk abou t the super-period map for supercurves and the calculation of its infinite simal variation. This variation is given by a natural Massey product that can be defined for any curve with a theta-characteristic. Combining this w ith the result of part 1 we get some information about the super-Schottky locus.\n LOCATION:https://researchseminars.org/talk/ZAG/25/ END:VEVENT END:VCALENDAR