The Grothendieck ring of varieties and cancellation property for orders in a quaternion algebra

Người báo cáo: Nguyễn Thế Hoàng


Thời gian: 16:30, thứ năm, 29/06/2023

Tóm tắt: A fundamental question about the Grothendieck ring of algebraic varieties is the following: whether two algebraic k-varieties with the same class in K_0(Var_k) are piecewise isomorphic. Using reduction to Krull-Schmidt categories, we reduce the above question for abelian varieties to the following cancellation problem: If we have an isomorphism Ooplus N cong M oplus N where M, N are finitely generated O-modules, and O is an order in a quaternion algebra, can we cancel out N. In this talk, I will explain a strategy to solve this problem.

Hình thức: Offline tại phòng 612 A6 và online qua google meet, cụ thể https://meet.google.com/yep-kbzk-eao?pli=1&authuser=1

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Xuất bản mới
Yongdo Lim, Hoàng Ngọc Tuấn, Nguyễn Đông Yên, DC algorithms in Hilbert spaces and the solution of indefinite infinite-dimensional quadratic programs, Journal of Global Optimization, Volume 95, pages 193–209 (2026)
Lương Thái Hưng, Jean-Claude Saut, On a regularized full dispersion Davey-Stewartson system, Discrete and Continuous Dynamical Systems, 2026, Volume 56: 557-578.
Cấn Văn Hảo, Naoki Kubota, Shuta Nakajima, Upper tail large deviation for the one-dimensional frog model, Probability Theory and Related Fields, Volume 194, pages 1945–2023 (2026)