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Polynomial Invariants of Finite Groups

Name: Polynomial Invariants of Finite Groups
Brand: Cambridge University Press
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Paperback | 6 December 1993

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132 Pages

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22.86 x 15.24 x 0.79

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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.

Industry Reviews

"...not only complete, it is written with a view to its being consulted on page 49 without having read up to page 48. It contains a wealth of material in updated form which should give a great impulse to further work, for example, an account of Dickson's work on invariants under the classical groups over finite fields." G.-C. Rota, Bulletin of Mathematics Books "...The exposition is uniformly excellent. It is also worth observing that many important ideas in modern commutative algebra were developed in connection with invariant theory and arise in the proofs cited...The author gives detailed, textbook-like explanations of all of these. As is customary for books published by Cambridge University Press in this series, the typography sets a standard of excellence and the price is remarkably low." Frank Grosshans, Mathematical Reviews

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You Can Find This Book In

Non-Fiction Mathematics Groups & Group Theory Algebra

Introduction	p. vii
Finite Generation of Invariants	p. 1
The basic object of study	p. 1
Noetherian rings and modules	p. 3
Finite groups in arbitrary characteristic	p. 5
Krull dimension and going up and down	p. 5
Noether's bound in characteristic zero	p. 9
Linearly reductive algebraic groups	p. 10
Poincare series	p. 13
The Hilbert-Serre theorem	p. 13
Noether normalization	p. 15
Systems of parameters	p. 18
Degree and [Psi]	p. 20
Molien's theorem	p. 21
Reflecting hyperplanes	p. 23
Divisor Classes, Ramification and Hyperplanes	p. 25
Divisors	p. 25
Primes of height one	p. 27
Duality	p. 30
Reflexive modules	p. 31
Divisor classes and unique factorization	p. 32
The Picard group	p. 33
The trace	p. 34
Ramification	p. 35
Cl(K[V][superscript G])	p. 37
The different	p. 39
The homological different	p. 40
A ramification formula	p. 42
The Carlisle-Kropholler conjecture	p. 43
Homological Properties of Invariants	p. 45
Minimal resolutions	p. 45
Hilbert's syzygy theorem	p. 47
Depth and Cohen-Macaulay rings	p. 50
Homological characterization of depth	p. 52
The canonical module and Gorenstein rings	p. 55
Watanabe's theorem	p. 59
Polynomial tensor exterior algebras	p. 61
Motivation and first properties	p. 61
A variation on Molien's theorem	p. 62
The invariants are graded Gorenstein	p. 63
The Jacobian	p. 64
Polynomial rings and regular local rings	p. 69
Regular local rings	p. 69
Serre's converse to Hilbert's syzygy theorem	p. 70
Uniqueness of factorization	p. 73
Reflexive modules	p. 74
Groups Generated by Pseudoreflections	p. 79
Reflections and pseudoreflections	p. 79
The Shephard-Todd theorem	p. 82
A theorem of Solomon	p. 86
Modular invariants	p. 89
Dickson's theorem	p. 89
The special linear group	p. 91
Symplectic invariants	p. 92
Examples over the complex numbers	p. 99
Examples over finite fields	p. 103
Bibliography	p. 109
Index	p. 116
Table of Contents provided by Syndetics. All Rights Reserved.

Polynomial Invariants of Finite Groups

At a Glance

Paperback

Industry Reviews

Shipping

How to return your order

Defective items

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