Crepant transformations for nonabelian GIT quotients

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• Rachel Webb (Cornell University)
• Wednesday 17 January 2024, 10:00-10:45
• Seminar Room 2, Newton Institute.

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EMG - New equivariant methods in algebraic and differential geometry

Geometric invariant theory (GIT) is a recipe for taking a quotient of a vector space by a linear action of a reductive group. The quotient also depends on a character of the group, though different characters will yield birational schemes (or stacks). I will explain one way to relate the Gromov-Witten theory of birational targets that arise in this fashion—-at least, I will explain one such example, namely the Grassmannian flop. This work is joint with Wendelin Lutz and Qaasim Shafi.

This talk is part of the Isaac Newton Institute Seminar Series series.

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