The Brauer group of commutative rings

Người báo cáo: Võ Quốc Bảo

Time: 14:00-15:45, 26/02/2026 (Thursday)

Venue: Room 612, A6, Institute of Mathematics-VAST

Online (Join Zoom Meeting) link: https://zoom.us/j/99636681387?pwd=0WscBnehOJig68SqctGluVuA3RwraE.1

Abstract: The Brauer group was generalized from fields to commutative rings by Auslander and
Goldman. Theorem 7.4 of [AG60] gives a local-global description of this group over regular rings of dimension 2. The authors asked for a general result. This talk presents an introduction to separable algebras and Brauer group over a commutative ring with emphasis on the purity results for regular rings of dimension 2.

Reference:
[AG60] Auslander and Goldman, The Brauer group of a commutative ring, Trans. Amer. Math. Soc. 97 (1960), 367–409.

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Đoàn Thái Sơn, Generic properties of the Lyapunov spectrum of compact operator cocycles on Hilbert spaces, Journal of Mathematical Analysis and Applications, Article: 131103 Volume: Volume 566, Issue 2 (2027)
Nguyễn Quốc Thắng, On rational points on homogeneous spaces over local and global fields and their Brauer and R-equivalence relations. II, Proceedings of the Japan Academy, Series A, Mathematical Sciences, 102 (7), 47-56, (July 2026)
Nguyễn Quốc Thắng, On rational points on homogeneous spaces over local and global fields and their Brauer and R-equivalence relations. I, Proceedings of the Japan Academy, Series A, Mathematical Sciences, 102 (7), 37-46, (July 2026)