Finite Reflection Groups

Author: L.C. Grove,C.T. Benson

Publisher: Springer Science & Business Media

ISBN: 1475718691

Category: Mathematics

Page: 136

View: 3535

Chapter 1 introduces some of the terminology and notation used later and indicates prerequisites. Chapter 2 gives a reasonably thorough account of all finite subgroups of the orthogonal groups in two and three dimensions. The presentation is somewhat less formal than in succeeding chapters. For instance, the existence of the icosahedron is accepted as an empirical fact, and no formal proof of existence is included. Throughout most of Chapter 2 we do not distinguish between groups that are "geo metrically indistinguishable," that is, conjugate in the orthogonal group. Very little of the material in Chapter 2 is actually required for the sub sequent chapters, but it serves two important purposes: It aids in the development of geometrical insight, and it serves as a source of illustrative examples. There is a discussion offundamental regions in Chapter 3. Chapter 4 provides a correspondence between fundamental reflections and funda mental regions via a discussion of root systems. The actual classification and construction of finite reflection groups takes place in Chapter 5. where we have in part followed the methods of E. Witt and B. L. van der Waerden. Generators and relations for finite reflection groups are discussed in Chapter 6. There are historical remarks and suggestions for further reading in a Post lude.

Mirrors and Reflections

The Geometry of Finite Reflection Groups

Author: Alexandre V. Borovik,Anna Borovik

Publisher: Springer Science & Business Media

ISBN: 0387790667

Category: Mathematics

Page: 172

View: 2672

This graduate/advanced undergraduate textbook contains a systematic and elementary treatment of finite groups generated by reflections. The approach is based on fundamental geometric considerations in Coxeter complexes, and emphasizes the intuitive geometric aspects of the theory of reflection groups. Key features include: many important concepts in the proofs are illustrated in simple drawings, which give easy access to the theory; a large number of exercises at various levels of difficulty; some Euclidean geometry is included along with the theory of convex polyhedra; no prerequisites are necessary beyond the basic concepts of linear algebra and group theory; and a good index and bibliography The exposition is directed at advanced undergraduates and first-year graduate students.

Reflection Groups and Coxeter Groups

Author: James E. Humphreys

Publisher: Cambridge University Press

ISBN: 9780521436137

Category: Mathematics

Page: 204

View: 4610

This graduate textbook presents a concrete and up-to-date introduction to the theory of Coxeter groups. The book is self-contained, making it suitable either for courses and seminars or for self-study. The first part is devoted to establishing concrete examples. Finite reflection groups acting on Euclidean spaces are discussed, and the first part ends with the construction of the affine Weyl groups, a class of Coxeter groups that plays a major role in Lie theory. The second part (which is logically independent of, but motivated by, the first) develops from scratch the properties of Coxeter groups in general, including the Bruhat ordering and the seminal work of Kazhdan and Lusztig on representations of Hecke algebras associated with Coxeter groups is introduced. Finally a number of interesting complementary topics as well as connections with Lie theory are sketched. The book concludes with an extensive bibliography on Coxeter groups and their applications.

Reflection Groups and Invariant Theory

Author: Richard Kane

Publisher: Springer Science & Business Media

ISBN: 1475735421

Category: Mathematics

Page: 379

View: 4490

Reflection groups and invariant theory is a branch of mathematics that lies at the intersection between geometry and algebra. The book contains a deep and elegant theory, evolved from various graduate courses given by the author over the past 10 years.

Buildings

Theory and Applications

Author: Peter Abramenko,Kenneth S. Brown

Publisher: Springer Science & Business Media

ISBN: 0387788352

Category: Mathematics

Page: 754

View: 4525

This book treats Jacques Tit's beautiful theory of buildings, making that theory accessible to readers with minimal background. It covers all three approaches to buildings, so that the reader can choose to concentrate on one particular approach. Beginners can use parts of the new book as a friendly introduction to buildings, but the book also contains valuable material for the active researcher. This book is suitable as a textbook, with many exercises, and it may also be used for self-study.

Algebraic Topology. Poznan 1989

Proceedings of a Conference held in Poznan, Poland, June 22-27, 1989

Author: Stefan Jackowski,Bob Oliver,Krzysztof Pawalowski

Publisher: Springer

ISBN: 9783540540984

Category: Mathematics

Page: 404

View: 2384

As part of the scientific activity in connection with the 70th birthday of the Adam Mickiewicz University in Poznan, an international conference on algebraic topology was held. In the resulting proceedings volume, the emphasis is on substantial survey papers, some presented at the conference, some written subsequently.

Handbook of Finite Translation Planes

Author: Norman Johnson,Vikram Jha,Mauro Biliotti

Publisher: Chapman and Hall/CRC

ISBN: 9781584886051

Category: Mathematics

Page: 888

View: 7086

The Handbook of Finite Translation Planes provides a comprehensive listing of all translation planes derived from a fundamental construction technique, an explanation of the classes of translation planes using both descriptions and construction methods, and thorough sketches of the major relevant theorems. From the methods of André to coordinate and linear algebra, the book unifies the numerous diverse approaches for analyzing finite translation planes. It pays particular attention to the processes that are used to study translation planes, including ovoid and Klein quadric projection, multiple derivation, hyper-regulus replacement, subregular lifting, conical distortion, and Hermitian sequences. In addition, the book demonstrates how the collineation group can affect the structure of the plane and what information can be obtained by imposing group theoretic conditions on the plane. The authors also examine semifield and division ring planes and introduce the geometries of two-dimensional translation planes. As a compendium of examples, processes, construction techniques, and models, the Handbook of Finite Translation Planes equips readers with precise information for finding a particular plane. It presents the classification results for translation planes and the general outlines of their proofs, offers a full review of all recognized construction techniques for translation planes, and illustrates known examples.

Algebra 1

Unter Benutzung von Vorlesungen von Emil Artin und Emmi Noether

Author: Bartel L. van der Waerden

Publisher: Springer-Verlag

ISBN: 3662015137

Category: Mathematics

Page: 292

View: 1486

Ziel des Buches. Die "abstrakte", "formale" oder "axiomatische" Richtung, der die Algebra ihren erneuten Aufschwung verdankt, hat vor allein in der Gruppentheorie, der Körpertheorie, der Bewertun- theorie, der Idealtheorie und der Theorie der hyperkomplexen Zahlen zu einer Reihe von neuartigen Begriffsbildungen, zur Einsicht in neue Zusammenhänge und zu weitreichenden Resultaten geführt. In diese ganze Begriffswelt den Leser einzuführen, soll das Hauptziel dieses Buches sein. Stehen demnach allgemeine Begriffe und Methoden im Vordergrun4, so sollen doch auch die Einzelresultate, die zum klassischen Bestand der Algebra gerechnet werden müssen. eine gehörige Berücksichtigung im Rahmen des modernen Aufbaus finden. Einteilung. Anweisungen für die Leser. Um die allgemeinen Gesichtspunkte, welche die "abstrakte" Auffassung der Algebra be herrschen, genügend klar zu entwickeln, war es notwendig, die Grund lagen der Gruppentheorie und der elementaren Algebra von Anfang an neu darzustellen. Angesichts der vielen in neuerer Zeit erschien~Ilen guten Darstellungen der Gruppentheorie, der klassischen Algebra und der Körpertheorie ergab sich die Möglichkeit, diese einleitenden Teile knapp (aber lückenlos) zu fassen. Eine breitere Darstellungkann der Anfänger jetzt überall finden!. Als weiteres Leitprinzip diente die Forderung, daß möglichst jeder einzelne Teil für sich allein verständlich sein soll. Wer die allgemeine Idealtheorie oder die Theorie der hyperkomplexen Zahlen kennenlernen will, braucht nicht die GALOIssche Theorie vorher zu studieren, und umgekehrt; und wer etwas über Elimination oder lineare Algebra nach schlagen will, darf nicht durch komplizierte idealtheoretische Begriffs bildungen abgeschreckt werden.

Unitary Reflection Groups

Author: Gustav I. Lehrer,Donald E. Taylor

Publisher: Cambridge University Press

ISBN: 0521749891

Category: Mathematics

Page: 294

View: 3254

A complex reflection is a linear transformation which fixes each point in a hyperplane. Intuitively, it resembles the transformation an image undergoes when it is viewed through a kaleidoscope, or arrangement of mirrors. This book gives a complete classification of all groups of transformations of n-dimensional complex space which are generated by complex reflections, using the method of line systems. In particular: irreducible groups are studied in detail, and are identified with finite linear groups; reflection subgroups of reflection groups are completely classified; the theory of eigenspaces of elements of reflection groups is discussed fully; an appendix outlines links to representation theory, topology and mathematical physics. Containing over 100 exercises ranging in difficulty from elementary to research level, this book is ideal for honours and graduate students, or for researchers in algebra, topology and mathematical physics.

The Finite Simple Groups

Author: Robert Wilson

Publisher: Springer Science & Business Media

ISBN: 1848009879

Category: Mathematics

Page: 298

View: 2901

Thisbookisintendedasanintroductiontoallthe?nitesimplegroups.During themonumentalstruggletoclassifythe?nitesimplegroups(andindeedsince), a huge amount of information about these groups has been accumulated. Conveyingthisinformationtothenextgenerationofstudentsandresearchers, not to mention those who might wish to apply this knowledge, has become a major challenge. With the publication of the two volumes by Aschbacher and Smith [12, 13] in 2004 we can reasonably regard the proof of the Classi?cation Theorem for Finite Simple Groups (usually abbreviated CFSG) as complete. Thus it is timely to attempt an overview of all the (non-abelian) ?nite simple groups in one volume. For expository purposes it is convenient to divide them into four basic types, namely the alternating, classical, exceptional and sporadic groups. The study of alternating groups soon develops into the theory of per- tation groups, which is well served by the classic text of Wielandt [170]and more modern treatments such as the comprehensive introduction by Dixon and Mortimer [53] and more specialised texts such as that of Cameron [19].

Lie Algebras and Algebraic Groups

Author: Patrice Tauvel,Rupert W. T. Yu

Publisher: Springer Science & Business Media

ISBN: 3540274278

Category: Mathematics

Page: 656

View: 2175

Devoted to the theory of Lie algebras and algebraic groups, this book includes a large amount of commutative algebra and algebraic geometry so as to make it as self-contained as possible. The aim of the book is to assemble in a single volume the algebraic aspects of the theory, so as to present the foundations of the theory in characteristic zero. Detailed proofs are included, and some recent results are discussed in the final chapters.