Xuất bản mới
Trần Hùng Cường, Yongdo Lim, Nguyễn Đông Yên, On a solution method in indefinite quadratic programming under linear constraints, Optimization, Volume 73, 2024 - Issue 4, Pages 1087-1112 (SCI-E, Scopus) .
Yongdo Lim, Hoàng Ngọc Tuấn, Nguyễn Đông Yên, Local Error Bounds for Affine Variational Inequalities on Hilbert Spaces,, Numerical Functional Analysis and Optimization, Volume 45, 2024, Issue 1, Pages 1-15 (SCI-E, Scopus) .
Đỗ Thái Dương, Nguyễn Văn Thiện, On the finite energy classes of quaternionic plurisubharmonic functions, Journal of Mathematical Analysis and Applications, Volume 541, Issue 1, January 2025, 128736 (SCI-E, Scopus) .

Grothendieck-Serre and Purity of torsors

Người báo cáo: Ning Guo

Thời gian: 16h30 - 18h00, thứ 5 ngày 19 tháng 10.

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

Tóm tắt: Torsors (or principal bundles) are generalization of vector bundles and they are basic objects of geometry and physics. A long-standing conjecture proposed by Grothendieck and Serre predicts that over a regular local ring, every generically trivial torsor under a reductive group scheme is trivial. The state of the art is the equi-characteristic case proved by Panin and Fedorov-Panin, the quasi-split unramified case by Cesnavicius, and the unramified case when the group scheme is constant by Guo-Liu and Guo-Panin-Stavrova. In this talk, I will introduce the Grothendieck-Serre conjecture, discuss several geometric methods (including presentation theorems and analysis of torsors over affine line), and its relation with purity.