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Author: Stefaan Caenepeel
Publisher: CRC Press
Published: 2020-08-26
Total Pages: 280
ISBN-13: 1000103781
DOWNLOAD EBOOK →This book introduces various notions defined in graded terms extending the notions most frequently used as basic ingredients in the theory of Azumaya algebras: separability and Galois extensions of commutative rings, crossed products and Galois cohomology, Picard groups, and the Brauer group.
Author: Stefaan Caenepeel
Publisher: CRC Press
Published: 2017-06-30
Total Pages:
ISBN-13: 9781138401778
DOWNLOAD EBOOK →"Based on papers presented at a recent international conference on algebra and algebraic geometry held jointly in Antwerp and Brussels, Belgium. Presents both survey and research articles featuring new results from the intersection of algebra and geometry. "
Author: Stefaan Caenepeel
Publisher: Springer Science & Business Media
Published: 1998
Total Pages: 512
ISBN-13: 9780792348290
DOWNLOAD EBOOK →This volume is devoted to the Brauer group of a commutative ring and related invariants. Part I presents a self-contained exposition of the Brauer group of a commutative ring. Included is a systematic development of the theory of Grothendieck topologies and etale cohomology, and discussion of topics such as Gabber's theorem and the theory of Taylor's big Brauer group of algebras without a unit. Part II presents a systematic development of the Galois theory of Hopf algebras with special emphasis on the group of Galois objects of a cocommutative Hopf algebra.
Author: Daniel Zelinsky
Publisher: Springer
Published: 1976
Total Pages: 210
ISBN-13:
DOWNLOAD EBOOK →Author: Stefaan Caenepeel
Publisher: CRC Press
Published: 2020-09-29
Total Pages: 352
ISBN-13: 1000153282
DOWNLOAD EBOOK →"Based on papers presented at a recent international conference on algebra and algebraic geometry held jointly in Antwerp and Brussels, Belgium. Presents both survey and research articles featuring new results from the intersection of algebra and geometry. "
Author: Stefaan Caenepeel
Publisher: Springer Science & Business Media
Published: 2002-03-31
Total Pages: 516
ISBN-13: 9781402003462
DOWNLOAD EBOOK →This volume is devoted to the Brauer group of a commutative ring and related invariants. Part I presents a new self-contained exposition of the Brauer group of a commutative ring. Included is a systematic development of the theory of Grothendieck topologies and étale cohomology, and discussion of topics such as Gabber's theorem and the theory of Taylor's big Brauer group of algebras without a unit. Part II presents a systematic development of the Galois theory of Hopf algebras with special emphasis on the group of Galois objects of a cocommutative Hopf algebra. The development of the theory is carried out in such a way that the connection to the theory of the Brauer group in Part I is made clear. Recent developments are considered and examples are included. The Brauer-Long group of a Hopf algebra over a commutative ring is discussed in Part III. This provides a link between the first two parts of the volume and is the first time this topic has been discussed in a monograph. Audience: Researchers whose work involves group theory. The first two parts, in particular, can be recommended for supplementary, graduate course use.
Author: Jean-Pierre Tignol
Publisher: Springer
Published: 2015-04-03
Total Pages: 643
ISBN-13: 3319163604
DOWNLOAD EBOOK →This monograph is the first book-length treatment of valuation theory on finite-dimensional division algebras, a subject of active and substantial research over the last forty years. Its development was spurred in the last decades of the twentieth century by important advances such as Amitsur's construction of non crossed products and Platonov's solution of the Tannaka-Artin problem. This study is particularly timely because it approaches the subject from the perspective of associated graded structures. This new approach has been developed by the authors in the last few years and has significantly clarified the theory. Various constructions of division algebras are obtained as applications of the theory, such as noncrossed products and indecomposable algebras. In addition, the use of valuation theory in reduced Whitehead group calculations (after Hazrat and Wadsworth) and in essential dimension computations (after Baek and Merkurjev) is showcased. The intended audience consists of graduate students and research mathematicians.
Author: Morris Orzech
Publisher: Marcel Dekker
Published: 1975
Total Pages: 204
ISBN-13:
DOWNLOAD EBOOK →Author: Constantin Nastasescu
Publisher: Springer Science & Business Media
Published: 2004-02-19
Total Pages: 324
ISBN-13: 9783540207467
DOWNLOAD EBOOK →The Category of Graded Rings.- The Category of Graded Modules.- Modules over Stronly Graded Rings.- Graded Clifford Theory.- Internal Homogenization.- External Homogenization.- Smash Products.- Localization of Graded Rings.- Application to Gradability.- Appendix A:Some Category Theory.- Appendix B: Dimensions in an abelian Category.- Bibliography.- Index.-
