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SUMMARY:Crepant transformations for nonabelian GIT quotients - Rachel Webb
DTSTART:20231129T141500Z
DTEND:20231129T151500Z
UID:TALK204592@talks.cam.ac.uk
CONTACT:Dhruv Ranganathan
DESCRIPTION:Geometric invariant theory (GIT) is a recipe for taking a quot
 ient of a vector\nspace by a linear action of a reductive group. The quoti
 ent also depends on a\ncharacter of the group\, though different character
 s will yield birational\nschemes (or stacks). I will explain one way to re
 late the Gromov-Witten theory\nof birational targets that arise in this fa
 shion---at least\, I will explain one\nsuch example\, namely the Grassmann
 ian flop. A significant portion of the talk\nwill be dedicated to understa
 nding some basic examples and phenomena in GIT (as\nthis turns out to be i
 mportant for understanding the main theorem).\n
LOCATION:CMS MR13
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