Number Theory Carbondale 1979 Proceedings of the Southern Illinois N

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751

Number Theory Carbondale 1979 Proceedings of the Southern Illinois Number Theory Conference Carbondale, March 30 and 31, 1979

Edited by Melvyn B. Nathanson

Springer-Verlag Berlin Heidelberg New York 1979

Editor

Melvyn B. Nathanson Department of Mathematics Southern Illinois University at Carbondale Carbondale, IL 62901/USA

AMS Subject Classifications (1980): 10-06 ISBN 3-540-09559-4 Springer-Verlag Berlin Heidelberg New York ISBN 0-387-09559-4 Springer-Verlag New York Heidelberg Berlin Library of Congress Cataloging in Publication Data Southern Illinois Number Theory Conference, Carbondale, Ill., 1979. Number theory, Carbondale 1979. (Lecture notes in mathamatics; 751) Bibliography: p. Includes index. 1. Numbers, Theory of--Congresses. I. Nathanson, Melvyn B., 1944· II. Title. Ill. Series: Lecture notes in mathematics (Berlin); 751. OA3.L28 no. 751 [OA241] 510'.8s [512'.7] 79-21887 ISBN 0·387·09559-4 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 1979 Printed in Germany

Printing and binding: Beltz Offsetdruck, Hemsbach/Bergstr. 2141/3140-543210

PREFACE These are the proceedings of a conference on number theory held at Southern Illinois University at Carbondale on March 30 and 31, 1979.

For many years, number theorists in Illinois and nearby states

have gathered each fall and spring on a Saturday morning to discuss their recent results and work in progress.

The SIU meeting was an

enlarged version of this Illinois Number Theory Conference.

More

than 50 mathematicians came together in Carbondale for 28 lectures on diverse topics in analytic, algebraic, additive, and combinatorial number theory.

This volume contains expanded versions of many of

these talks, as well as papers contributed by H. Cohn and G. V. Chudnovsky, who were unable to attend. I am grateful to the Department of Mathematics at Southern Illinois University at Carbondale for providing financial support for the conference.

I wish to thank Sharon Champion for her excellent

typing of several of the papers in this volume.

Finally, I thank

all of the number theorists who came to Carbondale for their contributions to the success of the conference.

Melvyn B. Nathanson 29 June 1979

TABLE OF CONTENTS 1.

K. Alladi and M. L. Robinson, On certain irrational values of the logarithm.

2.

R.

3.

W. Dale Brownawell, On the development of Gelfand's method.

18

4.

G. V. Chudnovsky, Transcendental numbers

45

5.

Harvey Cohn, Diophantine equations over IT(t) and complex multiplication . .

70

6.

Gary Cornell, Abhyankar's lemma and the class group.

82

7.

Paul Erdos and M