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Skew Fields

Skew Fields PDF Author: Paul Moritz Cohn
Publisher: Cambridge University Press
ISBN: 0521432170
Category : Mathematics
Languages : en
Pages : 522

Book Description
Non-commutative fields (also called skew fields or division rings) have not been studied as thoroughly as their commutative counterparts and most accounts have hitherto been confined to division algebras, that is skew fields finite-dimensional over their centre. Based on the author's LMS lecture note volume Skew Field Constructions, the present work offers a comprehensive account of skew fields. The axiomatic foundation and a precise description of the embedding problem are followed by an account of algebraic and topological construction methods, in particular, the author's general embedding theory is presented with full proofs, leading to the construction of skew fields. The powerful coproduct theorems of G. M. Bergman are proved here as well as the properties of the matrix reduction functor, a useful but little-known construction providing a source of examples and counter-examples. The construction and basic properties of existentially closed skew fields are given, leading to an example of a model class with an infinite forcing companion which is not axiomatizable. The treatment of equations over skew fields has been simplified and extended by the use of matrix methods, and the beginnings of non-commutative algebraic geometry are presented, with a precise account of the problems that need to be overcome for a satisfactory theory. A separate chapter describes valuations and orderings on skew fields, with a construction applicable to free fields. Numerous exercises test the reader's understanding, presenting further aspects and open problems in concise form, and notes and comments at the ends of chapters provide historical background.

Skew Fields

Skew Fields PDF Author: Paul Moritz Cohn
Publisher: Cambridge University Press
ISBN: 0521432170
Category : Mathematics
Languages : en
Pages : 522

Book Description
Non-commutative fields (also called skew fields or division rings) have not been studied as thoroughly as their commutative counterparts and most accounts have hitherto been confined to division algebras, that is skew fields finite-dimensional over their centre. Based on the author's LMS lecture note volume Skew Field Constructions, the present work offers a comprehensive account of skew fields. The axiomatic foundation and a precise description of the embedding problem are followed by an account of algebraic and topological construction methods, in particular, the author's general embedding theory is presented with full proofs, leading to the construction of skew fields. The powerful coproduct theorems of G. M. Bergman are proved here as well as the properties of the matrix reduction functor, a useful but little-known construction providing a source of examples and counter-examples. The construction and basic properties of existentially closed skew fields are given, leading to an example of a model class with an infinite forcing companion which is not axiomatizable. The treatment of equations over skew fields has been simplified and extended by the use of matrix methods, and the beginnings of non-commutative algebraic geometry are presented, with a precise account of the problems that need to be overcome for a satisfactory theory. A separate chapter describes valuations and orderings on skew fields, with a construction applicable to free fields. Numerous exercises test the reader's understanding, presenting further aspects and open problems in concise form, and notes and comments at the ends of chapters provide historical background.

Units in Skew Fields

Units in Skew Fields PDF Author: Ernst Kleinert
Publisher: Birkhäuser
ISBN: 3034884095
Category : Mathematics
Languages : en
Pages : 89

Book Description
This book is devoted to a study of the unit groups of orders in skew fields, finite dimensional and central over the rational field; it thereby belongs to the field of noncommutative arithmetic. Its purpose is a synopsis of results and methods, including full proofs of the most important results. It is addressed to researchers in number theory and arithmetic groups.

Skew Field Constructions

Skew Field Constructions PDF Author: P. M. Cohn
Publisher: CUP Archive
ISBN: 9780521214971
Category : Mathematics
Languages : en
Pages : 276

Book Description
"These notes describe methods of constructing skew fields, in particular the coproduct coconstruction discovered by the author, and trace out some of the consequences using the powerful coproduct theorems of G.M. Bergman, which are proved here."- publisher

Skew Fields

Skew Fields PDF Author: P. K. Draxl
Publisher: Cambridge University Press
ISBN: 0521272742
Category : Mathematics
Languages : en
Pages : 197

Book Description
The book is written in three parts. Part I consists of preparatory work on algebras, needed in Parts II and III. Part II consists of a modern description of the theory of Brauer groups over fields (from as elementary a point of view as possible). Part III covers some new developments in the theory which, until now, have not been available except in journals.

Representations of Rings Over Skew Fields

Representations of Rings Over Skew Fields PDF Author: A. H. Schofield
Publisher: Cambridge University Press
ISBN: 0521278538
Category : Mathematics
Languages : en
Pages : 237

Book Description
A study of representations of rings over skew fields.

Witt Rings of Skew Fields

Witt Rings of Skew Fields PDF Author: Andrzej Sładek
Publisher:
ISBN:
Category : Division rings
Languages : en
Pages : 56

Book Description


A Guide to Groups, Rings, and Fields

A Guide to Groups, Rings, and Fields PDF Author: Fernando Q. Gouvêa
Publisher: MAA
ISBN: 0883853558
Category : Mathematics
Languages : en
Pages : 329

Book Description
Insightful overview of many kinds of algebraic structures that are ubiquitous in mathematics. For researchers at graduate level and beyond.

Further Algebra and Applications

Further Algebra and Applications PDF Author: Paul M. Cohn
Publisher: Springer Science & Business Media
ISBN: 1447100395
Category : Mathematics
Languages : en
Pages : 454

Book Description
Here is the second volume of a revised edition of P.M. Cohn's classic three-volume text Algebra, widely regarded as one of the most outstanding introductory algebra textbooks. Volume Two focuses on applications. The text is supported by worked examples, with full proofs, there are numerous exercises with occasional hints, and some historical remarks.

Pillars of Computer Science

Pillars of Computer Science PDF Author: Arnon Avron
Publisher: Springer
ISBN: 3540781277
Category : Computers
Languages : en
Pages : 699

Book Description
For over half a century, Boris (Boaz) Trakhtenbrot has made seminal contributions to virtually all of the central areas of theoretical computer science. This festschrift volume readily illustrates the profound influence he has had on the field.

Abstract Algebra

Abstract Algebra PDF Author: Joseph H. Silverman
Publisher: American Mathematical Society
ISBN: 1470468603
Category : Mathematics
Languages : en
Pages : 567

Book Description
This abstract algebra textbook takes an integrated approach that highlights the similarities of fundamental algebraic structures among a number of topics. The book begins by introducing groups, rings, vector spaces, and fields, emphasizing examples, definitions, homomorphisms, and proofs. The goal is to explain how all of the constructions fit into an axiomatic framework and to emphasize the importance of studying those maps that preserve the underlying algebraic structure. This fast-paced introduction is followed by chapters in which each of the four main topics is revisited and deeper results are proven. The second half of the book contains material of a more advanced nature. It includes a thorough development of Galois theory, a chapter on modules, and short surveys of additional algebraic topics designed to whet the reader's appetite for further study. This book is intended for a first introduction to abstract algebra and requires only a course in linear algebra as a prerequisite. The more advanced material could be used in an introductory graduate-level course.