Varieties of Representations of Finitely Generated Groups

Varieties of Representations of Finitely Generated Groups

Author: Alexander Lubotzky

Publisher: American Mathematical Soc.

Published: 1985

Total Pages: 134

ISBN-13: 082182337X

DOWNLOAD EBOOK

The n-dimensional representations, over an algebraically closed characteristic zero field k, of a finitely generated group are parameterized by an affine algebraic variety over k. The tangent spaces of this variety are subspaces of spaces of one-cocycles and thus the geometry of the variety is locally related to the cohomology of the group. The cohomology is also related to the prounipotent radical of the proalgebraic hull of the group. This paper exploits these two relations to compute dimensions of representation varieties, especially for nilpotent groups and their generalizations. It also presents the foundations of the theory of representation varieties in an expository, self-contained manner.


Book Synopsis Varieties of Representations of Finitely Generated Groups by : Alexander Lubotzky

Download or read book Varieties of Representations of Finitely Generated Groups written by Alexander Lubotzky and published by American Mathematical Soc.. This book was released on 1985 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The n-dimensional representations, over an algebraically closed characteristic zero field k, of a finitely generated group are parameterized by an affine algebraic variety over k. The tangent spaces of this variety are subspaces of spaces of one-cocycles and thus the geometry of the variety is locally related to the cohomology of the group. The cohomology is also related to the prounipotent radical of the proalgebraic hull of the group. This paper exploits these two relations to compute dimensions of representation varieties, especially for nilpotent groups and their generalizations. It also presents the foundations of the theory of representation varieties in an expository, self-contained manner.

Representations of Finite Groups

Representations of Finite Groups

Author: Hirosi Nagao

Publisher: Elsevier

Published: 2014-05-10

Total Pages: 443

ISBN-13: 1483269930

DOWNLOAD EBOOK

Representations of Finite Groups provides an account of the fundamentals of ordinary and modular representations. This book discusses the fundamental theory of complex representations of finite groups. Organized into five chapters, this book begins with an overview of the basic facts about rings and modules. This text then provides the theory of algebras, including theories of simple algebras, Frobenius algebras, crossed products, and Schur indices with representation-theoretic versions of them. Other chapters include a survey of the fundamental theory of modular representations, with emphasis on Brauer characters. This book discusses as well the module-theoretic representation theory due to Green and includes some topics such as Burry–Carlson's theorem and Scott modules. The final chapter deals with the fundamental results of Brauer on blocks and Fong's theory of covering, and includes some approaches to them. This book is a valuable resource for readers who are interested in the various approaches to the study of the representations of groups.


Book Synopsis Representations of Finite Groups by : Hirosi Nagao

Download or read book Representations of Finite Groups written by Hirosi Nagao and published by Elsevier. This book was released on 2014-05-10 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: Representations of Finite Groups provides an account of the fundamentals of ordinary and modular representations. This book discusses the fundamental theory of complex representations of finite groups. Organized into five chapters, this book begins with an overview of the basic facts about rings and modules. This text then provides the theory of algebras, including theories of simple algebras, Frobenius algebras, crossed products, and Schur indices with representation-theoretic versions of them. Other chapters include a survey of the fundamental theory of modular representations, with emphasis on Brauer characters. This book discusses as well the module-theoretic representation theory due to Green and includes some topics such as Burry–Carlson's theorem and Scott modules. The final chapter deals with the fundamental results of Brauer on blocks and Fong's theory of covering, and includes some approaches to them. This book is a valuable resource for readers who are interested in the various approaches to the study of the representations of groups.

Representation Varieties of a Finitely Generated Group Into SL2 Or GL2

Representation Varieties of a Finitely Generated Group Into SL2 Or GL2

Author: Kyoji Saito

Publisher:

Published: 1993

Total Pages: 53

ISBN-13:

DOWNLOAD EBOOK


Book Synopsis Representation Varieties of a Finitely Generated Group Into SL2 Or GL2 by : Kyoji Saito

Download or read book Representation Varieties of a Finitely Generated Group Into SL2 Or GL2 written by Kyoji Saito and published by . This book was released on 1993 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Character Variety of Representations of a Finitely Generated Group in SL2

Character Variety of Representations of a Finitely Generated Group in SL2

Author: Kyoji Saito

Publisher:

Published: 1994

Total Pages: 15

ISBN-13:

DOWNLOAD EBOOK


Book Synopsis Character Variety of Representations of a Finitely Generated Group in SL2 by : Kyoji Saito

Download or read book Character Variety of Representations of a Finitely Generated Group in SL2 written by Kyoji Saito and published by . This book was released on 1994 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

$SL(2)$ Representations of Finitely Presented Groups

$SL(2)$ Representations of Finitely Presented Groups

Author: Gregory W. Brumfiel

Publisher: American Mathematical Soc.

Published: 1995

Total Pages: 208

ISBN-13: 0821804162

DOWNLOAD EBOOK

This book is essentially self-contained and requires only a basic abstract algebra course as background. The book includes and extends much of the classical theory of SL(2) representations of groups. Readers will find SL(2) Representations of Finitely Presented Groups relevant to geometric theory of three dimensional manifolds, representations of infinite groups, and invariant theory. Features...... * A new finitely computable invariant H[*p] associated to groups and used to study the SL(2) representations of *p * Invariant theory and knot theory related through SL(2) representations of knot groups.


Book Synopsis $SL(2)$ Representations of Finitely Presented Groups by : Gregory W. Brumfiel

Download or read book $SL(2)$ Representations of Finitely Presented Groups written by Gregory W. Brumfiel and published by American Mathematical Soc.. This book was released on 1995 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is essentially self-contained and requires only a basic abstract algebra course as background. The book includes and extends much of the classical theory of SL(2) representations of groups. Readers will find SL(2) Representations of Finitely Presented Groups relevant to geometric theory of three dimensional manifolds, representations of infinite groups, and invariant theory. Features...... * A new finitely computable invariant H[*p] associated to groups and used to study the SL(2) representations of *p * Invariant theory and knot theory related through SL(2) representations of knot groups.

A Course in Finite Group Representation Theory

A Course in Finite Group Representation Theory

Author: Peter Webb

Publisher: Cambridge University Press

Published: 2016-08-19

Total Pages: 339

ISBN-13: 1107162394

DOWNLOAD EBOOK

This graduate-level text provides a thorough grounding in the representation theory of finite groups over fields and rings. The book provides a balanced and comprehensive account of the subject, detailing the methods needed to analyze representations that arise in many areas of mathematics. Key topics include the construction and use of character tables, the role of induction and restriction, projective and simple modules for group algebras, indecomposable representations, Brauer characters, and block theory. This classroom-tested text provides motivation through a large number of worked examples, with exercises at the end of each chapter that test the reader's knowledge, provide further examples and practice, and include results not proven in the text. Prerequisites include a graduate course in abstract algebra, and familiarity with the properties of groups, rings, field extensions, and linear algebra.


Book Synopsis A Course in Finite Group Representation Theory by : Peter Webb

Download or read book A Course in Finite Group Representation Theory written by Peter Webb and published by Cambridge University Press. This book was released on 2016-08-19 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: This graduate-level text provides a thorough grounding in the representation theory of finite groups over fields and rings. The book provides a balanced and comprehensive account of the subject, detailing the methods needed to analyze representations that arise in many areas of mathematics. Key topics include the construction and use of character tables, the role of induction and restriction, projective and simple modules for group algebras, indecomposable representations, Brauer characters, and block theory. This classroom-tested text provides motivation through a large number of worked examples, with exercises at the end of each chapter that test the reader's knowledge, provide further examples and practice, and include results not proven in the text. Prerequisites include a graduate course in abstract algebra, and familiarity with the properties of groups, rings, field extensions, and linear algebra.

Character Variety of Representations of a Finitely Generated Group in $ SL_2 $

Character Variety of Representations of a Finitely Generated Group in $ SL_2 $

Author: K. Saito

Publisher:

Published: 1996

Total Pages: 12

ISBN-13:

DOWNLOAD EBOOK


Book Synopsis Character Variety of Representations of a Finitely Generated Group in $ SL_2 $ by : K. Saito

Download or read book Character Variety of Representations of a Finitely Generated Group in $ SL_2 $ written by K. Saito and published by . This book was released on 1996 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Representations of Algebraic Groups

Representations of Algebraic Groups

Author: Jens Carsten Jantzen

Publisher: American Mathematical Soc.

Published: 2003

Total Pages: 594

ISBN-13: 082184377X

DOWNLOAD EBOOK

Gives an introduction to the general theory of representations of algebraic group schemes. This title deals with representation theory of reductive algebraic groups and includes topics such as the description of simple modules, vanishing theorems, Borel-Bott-Weil theorem and Weyl's character formula, and Schubert schemes and lne bundles on them.


Book Synopsis Representations of Algebraic Groups by : Jens Carsten Jantzen

Download or read book Representations of Algebraic Groups written by Jens Carsten Jantzen and published by American Mathematical Soc.. This book was released on 2003 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gives an introduction to the general theory of representations of algebraic group schemes. This title deals with representation theory of reductive algebraic groups and includes topics such as the description of simple modules, vanishing theorems, Borel-Bott-Weil theorem and Weyl's character formula, and Schubert schemes and lne bundles on them.

Representations of Finite Groups: Local Cohomology and Support

Representations of Finite Groups: Local Cohomology and Support

Author: David J. Benson

Publisher: Springer Science & Business Media

Published: 2011-11-15

Total Pages: 115

ISBN-13: 3034802609

DOWNLOAD EBOOK

The seminar focuses on a recent solution, by the authors, of a long standing problem concerning the stable module category (of not necessarily finite dimensional representations) of a finite group. The proof draws on ideas from commutative algebra, cohomology of groups, and stable homotopy theory. The unifying theme is a notion of support which provides a geometric approach for studying various algebraic structures. The prototype for this has been Daniel Quillen’s description of the algebraic variety corresponding to the cohomology ring of a finite group, based on which Jon Carlson introduced support varieties for modular representations. This has made it possible to apply methods of algebraic geometry to obtain representation theoretic information. Their work has inspired the development of analogous theories in various contexts, notably modules over commutative complete intersection rings and over cocommutative Hopf algebras. One of the threads in this development has been the classification of thick or localizing subcategories of various triangulated categories of representations. This story started with Mike Hopkins’ classification of thick subcategories of the perfect complexes over a commutative Noetherian ring, followed by a classification of localizing subcategories of its full derived category, due to Amnon Neeman. The authors have been developing an approach to address such classification problems, based on a construction of local cohomology functors and support for triangulated categories with ring of operators. The book serves as an introduction to this circle of ideas.


Book Synopsis Representations of Finite Groups: Local Cohomology and Support by : David J. Benson

Download or read book Representations of Finite Groups: Local Cohomology and Support written by David J. Benson and published by Springer Science & Business Media. This book was released on 2011-11-15 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: The seminar focuses on a recent solution, by the authors, of a long standing problem concerning the stable module category (of not necessarily finite dimensional representations) of a finite group. The proof draws on ideas from commutative algebra, cohomology of groups, and stable homotopy theory. The unifying theme is a notion of support which provides a geometric approach for studying various algebraic structures. The prototype for this has been Daniel Quillen’s description of the algebraic variety corresponding to the cohomology ring of a finite group, based on which Jon Carlson introduced support varieties for modular representations. This has made it possible to apply methods of algebraic geometry to obtain representation theoretic information. Their work has inspired the development of analogous theories in various contexts, notably modules over commutative complete intersection rings and over cocommutative Hopf algebras. One of the threads in this development has been the classification of thick or localizing subcategories of various triangulated categories of representations. This story started with Mike Hopkins’ classification of thick subcategories of the perfect complexes over a commutative Noetherian ring, followed by a classification of localizing subcategories of its full derived category, due to Amnon Neeman. The authors have been developing an approach to address such classification problems, based on a construction of local cohomology functors and support for triangulated categories with ring of operators. The book serves as an introduction to this circle of ideas.

Representations of Finite Groups

Representations of Finite Groups

Author: C. Musili

Publisher: Springer

Published: 1993-01-01

Total Pages: 252

ISBN-13: 9380250851

DOWNLOAD EBOOK


Book Synopsis Representations of Finite Groups by : C. Musili

Download or read book Representations of Finite Groups written by C. Musili and published by Springer. This book was released on 1993-01-01 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: