K-Theory and Operator Algebras Proceedings of a Conference held at t

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575 K-Theory and Operator Algebras Proceedings of a Conference held at the University of Georgia in Athens, Georgia, April 21-25, 1975

Edited by B. B. Morrel and I. M. Singer

Spri nger-Verlag Berlin· Heidelberg· New York 1977

Editors Bernard B. Morrel Department of Mathematics Swain Hall East, Indiana University Bloomington, IN 47401/USA

I. M. Singer Department of Mathematics Massachusetts Institute of Technology Cambridge, MA 02139/USA

Library of Congress Cataloging in Publication Data

ConferenCE; on K-Theory and Operato:::' si ty of Georgia, 1975. K-tteory a:1d operator algebras.

Al~"etras,

"JEi',I

(Lecture notes in mathemat::.cs ; 575) 1. K-theory--Congresses. 2. Operator algebras--

Cong resses. I. Morrel, Bernar::1 B. II. Isadore Manuel, ::"924III. Title. IV.

Lecture notes in mathematiss (Eerlin) ; 575. Q,A3.I28 no. 575 [G,A6l2.33J 5l0' .8s 77-1050

[5l4' .23 J

AMSSubjectClassifications(1970): 18F25, 46-02, 46 L05, 46 L 10,47-02, 47G05, 55-02, 55B15, 58-02, 58GlO, 58G15 ISBN 3-540-08133-X Springer-Verlag Berlin' Heidelberg· New York ISBN 0-387-08133-X Springer-Verlag New York . Heidelberg· Berlin 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 the publisher, the amount of the fee to be determined by agreement with the publisher.

© by Springer-Verlag Berlin' Heidelberg 1977 Printing and binding: Beltz Offsetdruck, Hemsbach/Bergstr. 214113140-543210

Preface This volume records most of the talks given at the Conference on K-theory and Operator Algebras held at the University of Georgia in Athe ns, Georgia, April 21April 25, 1975.

The purpose of the conference was to

review the known connections between operator theory and K-theory and explore possible new ones.

Consequently,

some o f the papers present historical background, some develop new ideas, some are expository in an attempt to acquaint experts in the one field with recent developments in the other, and some pose new problems which further developments might solve. We are happy to express our thanks to the National Science Foundation for sponsoring the meeting, to the University of Georgia for providing funds for additional participants, to the Mathematics Department for its gracious hospitality, Ms. Ann

t o Ms. Teddy Schultz, Ms. Carol Ledbetter and

Ware for the typing, to the authors for their

manuscripts and their patien ce , and to Springer-Verlag f or publishing this volume. Bernard Morrel I. M. Singer

CONTENTS

1.

M. F. ATIYAH A survey of K-theory

4.

LAWRENCE G. BROWN Characterizing ext (X)

S.

.

RICHARD W. CAREY and JOEL D. PINCUS Almost commuting algebras . . .

6.

KARL HEINRICH

78

DUSA MACDUFF Configuration spaces

11.

70

RONNIE LEE and R. H. SZCZARBA On algebraic K-theory an