Speaker: Yefeng Shen (University of Oregon)
Abstract: I will talk about the quantum spectrum and Gamma structure for projective bundles, blow-ups, and standard flips. After restricting the quantum multiplication to the exceptional curve direction, we obtain a decomposition of the quantum cohomology of standard flips into asymptotic Gamma classes. We then show that this decomposition is compatible with the semi-orthogonal decompositions for these spaces constructed in work of Orlov and Belmans-Fu-Raedschelders. If time permits, I will talk about the generalization to weighted flips. The talk is based on work joint with Mark Shoemaker.
Time: 13:30, Thur., Jul. 31, 2025
Location: R810, SIMIS
Zoom Meeting ID: 701 504 7510 (Passcode: SIMIS)
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