Skip to Main Content

Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

What is MCQ? The Mathematical Citation Quotient (MCQ) measures journal impact by looking at citations over a five-year period. Subscribers to MathSciNet may click through for more detailed information.

 

The Brauer group is torsion
HTML articles powered by AMS MathViewer

by David J. Saltman PDF
Proc. Amer. Math. Soc. 81 (1981), 385-387 Request permission

Abstract:

We present a new proof that if $A$ is an Azumaya algebra over a commutative ring $R$ of rank ${n^2}$, then ${A^n} = A{ \otimes _R} \cdots { \otimes _R}A$ is a split Azumaya algebra ${\text {En}}{{\text {d}}_R}(P)$. We provide a description of $P$, including that it is a direct summand of ${A^n}$.
References
    Nathan Bourbaki, Commutative algebra, Addison-Wesley, Reading, Mass., 1972.
  • Frank DeMeyer and Edward Ingraham, Separable algebras over commutative rings, Lecture Notes in Mathematics, Vol. 181, Springer-Verlag, Berlin-New York, 1971. MR 0280479
  • Alexander Grothendieck, Le groupe de Brauer. I. Algèbres d’Azumaya et interprétations diverses, Dix exposés sur la cohomologie des schémas, Adv. Stud. Pure Math., vol. 3, North-Holland, Amsterdam, 1968, pp. 46–66 (French). MR 244269
  • Max-Albert Knus and Manuel Ojanguren, Théorie de la descente et algèbres d’Azumaya, Lecture Notes in Mathematics, Vol. 389, Springer-Verlag, Berlin-New York, 1974 (French). MR 0417149
  • David J. Saltman, Norm polynomials and algebras, J. Algebra 62 (1980), no. 2, 333–345. MR 563232, DOI 10.1016/0021-8693(80)90186-6
  • Tsuneo Tamagawa, Representation theory and the notion of the discriminant, Algebraic number theory (Kyoto Internat. Sympos., Res. Inst. Math. Sci., Univ. Kyoto, Kyoto, 1976) Japan Soc. Promotion Sci., Tokyo, 1977, pp. 219–227. MR 0485817
Similar Articles
  • Retrieve articles in Proceedings of the American Mathematical Society with MSC: 16A16, 13A20
  • Retrieve articles in all journals with MSC: 16A16, 13A20
Additional Information
  • © Copyright 1981 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 81 (1981), 385-387
  • MSC: Primary 16A16; Secondary 13A20
  • DOI: https://doi.org/10.1090/S0002-9939-1981-0597646-5
  • MathSciNet review: 597646