Representation Theory II Groups and Orders Proceedings of the Fourth

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1178 Representation Theory II Groups and Orders Proceedings of the Fourth International Conference on Representations of Algebras held in Ottawa, Canada, August 16-25, 1984

Edited by V. Olab, P. Gabriel and G. Michler

Springer-Verlag Berlin Heidelberg New York Tokyo

Lecture Notes in Mathematics Edited by A. Oold and B. Eckmann

1178 Representation Theory II Groups and Orders Proceedings of the Fourth International Conference on Representations of Algebras held in Ottawa, Canada, August 16-25, 1984

Edited by V. Olab, P. Gabriel and G. Michler

Springer-Verlag Berlin Heidelberg New York Tokyo

Editors Vlastimil Dlab Department of Mathematics, Carleton University Ottawa, Ontario, Canada K 1S 5B6 Peter Gabriel Mathematisches Institut, Universitat Zurich Ramistrasse 74, 8001 Zurich, Switzerland Gerhard Michler Fachbereich Mathematik, Gesamthochschule Essen Universitatsstr, 3, 4300 Essen, Federal Republic of Germany

Mathematics Subject Classification (1980): 14T17, 16A 18, 20C05, 20 C 10, 20C20, 20E32, 20T06 ISBN 3-540-16433-2 Springer-Verlag Berlin Heidelberg New York Tokyo ISBN 0-387 -16433-2 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 "Vervvertungsgesellschaft Wort", Munich. © by Springer-Verlag Berlin Heidelberg 1986 Printed in Germany

Printing and binding: Beltz Offsetdruck, Hemsbach/Bergstr. 2146/3140-543210

PREFACE The took the

place

August

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international

amidst

subject.

on

a

fourth

a

1984;

16-26,

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financial

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Carleton

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Reiten,

Lecture

in

Notes

assistance

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representation

theory

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preliminary

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Michler,

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Green,

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CONFERENCE

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Springer Lecture Notes

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algebras

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Carleton-Ottawa

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acknowledge

from the Natural Sciences and Engineering

Research Council of Canada of

important

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Carleton University for

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