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SUMMARY:Chris Fraser (Minnesota)
DTSTART:20211129T130000Z
DTEND:20211129T140000Z
DTSTAMP:20260710T044510Z
UID:paris-algebra-seminar/72
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/paris-algebr
 a-seminar/72/">Automorphisms of open positroid varieties from braids</a>\n
 by Chris Fraser (Minnesota) as part of Paris algebra seminar\n\n\nAbstract
 \nPositroid varieties are distinguished subvarieties of Grassmannians whic
 h have cluster structure(s). I will give some reminders on the combinatori
 cs underlying these cluster structures\, partially based on a joint work w
 ith Melissa Sherman-Bennett. In a previous work\, I described an action of
  a certain braid group on the top-dimensional positroid subvariety by "qua
 si" cluster automorphisms. I will explain how a similar statement can be e
 xtended to arbitrary open positroid varieties. This is joint with Bernhard
  Keller.\n
LOCATION:https://researchseminars.org/talk/paris-algebra-seminar/72/
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