Representation Theory and Beyond

Representation Theory and Beyond
Author: Jan Šťovíček
Publisher: American Mathematical Soc.
Total Pages: 298
Release: 2020-11-13
Genre: Education
ISBN: 147045131X

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This volume contains the proceedings of the Workshop and 18th International Conference on Representations of Algebras (ICRA 2018) held from August 8–17, 2018, in Prague, Czech Republic. It presents several themes of contemporary representation theory together with some new tools, such as stable ∞ ∞-categories, stable derivators, and contramodules. In the first part, expanded lecture notes of four courses delivered at the workshop are presented, covering the representation theory of finite sets with correspondences, geometric theory of quiver Grassmannians, recent applications of contramodules to tilting theory, as well as symmetries in the representation theory over an abstract stable homotopy theory. The second part consists of six more-advanced papers based on plenary talks of the conference, presenting selected topics from contemporary representation theory: recollements and purity, maximal green sequences, cohomological Hall algebras, Hochschild cohomology of associative algebras, cohomology of local selfinjective algebras, and the higher Auslander–Reiten theory studied via homotopy theory.

Representation Theory and Beyond

Representation Theory and Beyond
Author: Jan Št̓ovíček
Publisher:
Total Pages:
Release: 2020
Genre: Homology theory
ISBN: 9781470456993

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Beyond Representation

Beyond Representation
Author: Geraldine Harris
Publisher: Manchester University Press
Total Pages: 224
Release: 2013-07-19
Genre: Art
ISBN: 9781847791726

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Beyond representation poses the question as to whether over the last thirty years there have been signs of ‘progress’ or ’progressiveness’ in the representation of ‘marginalised’ or subaltern identity categories within television drama in Britain and the US. In doing so it interrogates some of the key assumptions concerning the relationship between aesthetics and the politics of identity that have influenced and informed television drama criticism during this period. This book can function as a textbook because it provides students with a clear and coherent pathway through complex, wide-reaching and highly influential interdisciplinary terrain. Yet its rigorous and incisive re-evaluation of some of the key concepts that dominated academic thought in the twentieth century also make it of interest to scholars and specialists. Chapters examine ideas around politics and aesthetics emerging from Marxist-socialism and postmodernism, feminism and postmodern feminism, anti-racism and postcolonialism, queer theory and theories of globalisation, so as to evaluates their impact on television criticism and on television as an institution. These discussions are consolidated through case studies that offer analyses of a range of television drama texts including Big Women, Ally McBeal, Supply and Demand, The Bill, Second Generation, Star Trek (Enterprise), Queer as Folk, Metrosexuality and The Murder of Stephen Lawrence. This book is aimed at students and scholars of Television Drama, Media and Communication, Cultural Studies, Women’s Studies and those concerned with questions of politics and aesthetics in other disciplines.

Representation Theory of Finite Groups and Associative Algebras

Representation Theory of Finite Groups and Associative Algebras
Author: Charles W. Curtis
Publisher: American Mathematical Soc.
Total Pages: 714
Release: 2006
Genre: Mathematics
ISBN: 0821840665

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Provides an introduction to various aspects of the representation theory of finite groups. This book covers such topics as general non-commutative algebras, Frobenius algebras, representations over non-algebraically closed fields and fields of non-zero characteristic, and integral representations.

Representations of Semisimple Lie Algebras in the BGG Category O

Representations of Semisimple Lie Algebras in the BGG Category O
Author: James E. Humphreys
Publisher: American Mathematical Soc.
Total Pages: 289
Release: 2021-07-14
Genre: Education
ISBN: 1470463261

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This is the first textbook treatment of work leading to the landmark 1979 Kazhdan–Lusztig Conjecture on characters of simple highest weight modules for a semisimple Lie algebra g g over C C. The setting is the module category O O introduced by Bernstein–Gelfand–Gelfand, which includes all highest weight modules for g g such as Verma modules and finite dimensional simple modules. Analogues of this category have become influential in many areas of representation theory. Part I can be used as a text for independent study or for a mid-level one semester graduate course; it includes exercises and examples. The main prerequisite is familiarity with the structure theory of g g. Basic techniques in category O O such as BGG Reciprocity and Jantzen's translation functors are developed, culminating in an overview of the proof of the Kazhdan–Lusztig Conjecture (due to Beilinson–Bernstein and Brylinski–Kashiwara). The full proof however is beyond the scope of this book, requiring deep geometric methods: D D-modules and perverse sheaves on the flag variety. Part II introduces closely related topics important in current research: parabolic category O O, projective functors, tilting modules, twisting and completion functors, and Koszul duality theorem of Beilinson–Ginzburg–Soergel.

A Course in Finite Group Representation Theory

A Course in Finite Group Representation Theory
Author: Peter Webb
Publisher: Cambridge University Press
Total Pages: 339
Release: 2016-08-19
Genre: Mathematics
ISBN: 1107162394

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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.

Introduction to Lie Algebras and Representation Theory

Introduction to Lie Algebras and Representation Theory
Author: J.E. Humphreys
Publisher: Springer Science & Business Media
Total Pages: 189
Release: 2012-12-06
Genre: Mathematics
ISBN: 1461263980

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This book is designed to introduce the reader to the theory of semisimple Lie algebras over an algebraically closed field of characteristic 0, with emphasis on representations. A good knowledge of linear algebra (including eigenvalues, bilinear forms, euclidean spaces, and tensor products of vector spaces) is presupposed, as well as some acquaintance with the methods of abstract algebra. The first four chapters might well be read by a bright undergraduate; however, the remaining three chapters are admittedly a little more demanding. Besides being useful in many parts of mathematics and physics, the theory of semisimple Lie algebras is inherently attractive, combining as it does a certain amount of depth and a satisfying degree of completeness in its basic results. Since Jacobson's book appeared a decade ago, improvements have been made even in the classical parts of the theory. I have tried to incor porate some of them here and to provide easier access to the subject for non-specialists. For the specialist, the following features should be noted: (I) The Jordan-Chevalley decomposition of linear transformations is emphasized, with "toral" subalgebras replacing the more traditional Cartan subalgebras in the semisimple case. (2) The conjugacy theorem for Cartan subalgebras is proved (following D. J. Winter and G. D. Mostow) by elementary Lie algebra methods, avoiding the use of algebraic geometry.

Algebras and Representation Theory

Algebras and Representation Theory
Author: Karin Erdmann
Publisher: Springer
Total Pages: 304
Release: 2018-09-07
Genre: Mathematics
ISBN: 3319919989

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This carefully written textbook provides an accessible introduction to the representation theory of algebras, including representations of quivers. The book starts with basic topics on algebras and modules, covering fundamental results such as the Jordan-Hölder theorem on composition series, the Artin-Wedderburn theorem on the structure of semisimple algebras and the Krull-Schmidt theorem on indecomposable modules. The authors then go on to study representations of quivers in detail, leading to a complete proof of Gabriel's celebrated theorem characterizing the representation type of quivers in terms of Dynkin diagrams. Requiring only introductory courses on linear algebra and groups, rings and fields, this textbook is aimed at undergraduate students. With numerous examples illustrating abstract concepts, and including more than 200 exercises (with solutions to about a third of them), the book provides an example-driven introduction suitable for self-study and use alongside lecture courses.

Representation Theory of Artin Algebras

Representation Theory of Artin Algebras
Author: Maurice Auslander
Publisher: Cambridge University Press
Total Pages: 444
Release: 1997-08-21
Genre: Mathematics
ISBN: 9780521599238

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This book is an introduction to the contemporary representation theory of Artin algebras, by three very distinguished practitioners in the field. Beyond assuming some first-year graduate algebra and basic homological algebra, the presentation is entirely self-contained, so the book is suitable for any mathematicians (especially graduate students) wanting an introduction to this active field.'...written in a clear comprehensive style with full proofs. It can very well serve as an excellent reference as well as a textbook for graduate students.' EMS Newletter