Structure and Representations of Q-groups

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1084 Dennis Kletzing

Structure and Representations of Q-Groups

Springer-Verlag Berlin Heidelberg New York Tokyo 1984

Author

Dennis Kletzing Department of Mathematics and Computer Science Stetson University DeLand, Florida 32720, USA

AMS Subject Classification (1980): 20C, 20 E, 13H ISBN 3-540-13865-X Springer-Verlag Berlin Heidelberg New York Tokyo ISBN 0-387-13865-X Springer-Verlag New York Heidelberg Berlin Tokyo

This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically those of translation, reprinting, re-use of illustrations, broadcasting, reproduction by photocopying machine or similar means, and storage in data banks. Under § 54 of the German Copyright Law where copies are made for other than private use, a fee is payable to "Verwertungsgesellschaft Wort", Munich.

© by Springer-Verlag Berlin Heidelberg 1984 Printed in Germany Printing and binding: Beltz Offsetdruck, Hemsbach / Bergstr. 2146/3140-543210

Preface

These notes span a decade of research and reflect the contributions of many individuals. There is one person, however, who has influenced this work to the extent that it would not exist were it not for his constant support and encouragement. He is Professor Ernst Snapper of Da.rtrrDuth College. It is with sincere express my appreciation to him for many, many years of mathematical

that I and

unselfish friendship. I also wish to thank Dr. John Rasmussen for many stimulating conversations. Finally, this work was supported by research grants received from Stetson Uni versi ty. It was writ.ten while on sabbatical leave at Da.rtrrDuth

DeLand, Florida July, 1984

Dennis Kletzing

Introduction Notation .

5

1:..

7

Chapter 1.

Basic

2.

Structure of Q-groups having abelian or dihedral Sylow 2-subgroups

of Q-groups

8

and involutory Q-groups

3.

20 24

4.

Solvable Q-groups . . . .

39

5.

The partially ordered set defined by a Q-group

47

Constructions

58

Q-Groups

1.

Wreath products .

59

2.

Semi-direct products

77

3.

App.L:1Ccl.tl_on to the Weyl groups of types

4.

Theory of transversal pernartat ion r-epr-aserrrat.i.ons

Chapter 3.

and D

n

93 97

105

Local

1.

Closed algebras. The local

no

2.

Local idempotents

130

3•

The combinatorics of p-classes

4•

Local restriction and local induction

5•

The local subgroup

6.

Local multiplicities

Chapter

The local induction prin(:iI)le

143 159 161 174

Representations

1.

The local invariants

180

2.

The local character ring rCGV)V

187

3.

Local splitting

207

.

VI

Application to the Weyl Groups of Exceptional

220 221

1.

F

2.

E S

233

3.

E

240

4.

E

4

7

243

8

Appendix . .

2S9

The character table of F4

270

rl*(F

271

.

4)

The character table of F4/Center

272

rl*(F

273

4/Center)

. .

Conjugacy classes of E S

274

The character table of E S

275

rl*CE

27S

.

S)

•.. . .

+

277

ConJugacy classes of E 7

+

The character table of E 7

278

"r\;'(E+) 7

280

•••••

Conjugacy classes of E

8

281

References

283

Ind