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Polynomial invariants of finite groups /

This is the first book to deal with invariant theory and the representations of finite groups. By restricting attention to finite groups Dr Benson is able to avoid recourse to the technical machinery of algebraic groups, and he develops the necessary results from commutative algebra as he proceeds....

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Detalles Bibliográficos
Clasificación:Libro Electrónico
Autor principal: Benson, D. J. (David J.), 1955-
Formato: Electrónico eBook
Idioma:Inglés
Publicado: Cambridge ; New York : Cambridge University Press, ©1993.
Colección:London Mathematical Society lecture note series ; 190.
Temas:
Acceso en línea:Texto completo

MARC

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100 1 |a Benson, D. J.  |q (David J.),  |d 1955- 
245 1 0 |a Polynomial invariants of finite groups /  |c D.J. Benson. 
260 |a Cambridge ;  |a New York :  |b Cambridge University Press,  |c ©1993. 
300 |a 1 online resource (ix, 118 pages) 
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490 1 |a London Mathematical Society lecture note series ;  |v 190 
504 |a Includes bibliographical references (pages 109-115) and index. 
588 0 |a Print version record. 
520 |a This is the first book to deal with invariant theory and the representations of finite groups. By restricting attention to finite groups Dr Benson is able to avoid recourse to the technical machinery of algebraic groups, and he develops the necessary results from commutative algebra as he proceeds. Thus the book should be accessible to graduate students. In detail, the book contains an account of invariant theory for the action of a finite group on the ring of polynomial functions on a linear representation, both in characteristic zero and characteristic p. Special attention is paid to the role played by pseudoreflections, which arise because they correspond to the divisors in the polynomial ring which ramify over the invariants. Also included is a new proof by Crawley-Boevey and the author of the Carlisle-Kropholler conjecture. This volume will appeal to all algebraists, but especially those working in representation theory, group theory, and commutative or homological algebra. 
505 0 |a Cover; Title; Contents; Introduction; 1 Finite Generation of Invariants; 1.1 The basic object of study; 1.2 Noetherian rings and modules; 1.3 Finite groups in arbitrary characteristic; 1.4 Krull dimension and going up and down; 1.5 Noether's bound in characteristic zero; 1.6 Linearly reductive algebraic groups; 2 Poincare series; 2.1 The Hilbert-Serre theorem; 2.2 Noether normalization; 2.3 Systems of parameters; 2.4 Degree and if>; 2.5 Molien's theorem; 2.6 Reflecting hyperplanes; 3 Divisor Classes, Ramification and Hyperplanes; 3.1 Divisors; 3.2 Primes of height one; 3.3 Duality 
505 8 |a 3.4 Reflexive modules3.5 Divisor classes and unique factorization; 3.6 The Picard group; 3.7 The trace; 3.8 Ramification; 3.9 Cl(ii:[V]G); 3.10 The different; 3.11 The homological different; 3.12 A ramification formula; 3.13 The Carlisle-Kropholler conjecture; 4 Homological Properties of Invariants; 4.1 Minimal resolutions; 4.2 Hilbert's syzygy theorem; 4.3 Depth and Cohen-Macaulay rings; 4.4 Homological characterization of depth; 4.5 The canonical module and Gorenstein rings; 4.6 Watanabe's theorem; 5 Polynomial tensor exterior algebras; 5.1 Motivation and first properties 
505 8 |a 5.2 A variation on Molien's theorem5.3 The invariants are graded Gorenstein; 5.4 The Jacobian; 6 Polynomial rings and regular local rings; 6.1 Regular local rings; 6.2 Serre's converse to Hilbert's syzygy theorem; 6.3 Uniqueness of factorization; 6.4 Reflexive modules; 7 Groups Generated by Pseudoreflections; 7.1 Reflections and pseudoreflections; 7.2 The Shephard-Todd theorem; 7.3 A theorem of Solomon; 8 Modular invariants; 8.1 Dickson's theorem; 8.2 The special linear group; 8.3 Symplectic invariants; A Examples over the complex numbers; B Examples over finite fields; Bibliography; Index 
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650 0 |a Finite groups. 
650 0 |a Divisor theory. 
650 6 |a Invariants. 
650 6 |a Groupes finis. 
650 6 |a Théorie des diviseurs. 
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650 7 |a Finite groups  |2 fast 
650 7 |a Invariants  |2 fast 
650 7 |a Endliche Gruppe  |2 gnd 
650 7 |a Invariante  |2 gnd 
650 7 |a Invariantentheorie  |2 gnd 
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