Modular Functions of One Variable III Proceedings International Summ

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350 Modular Functions of One Variable III Proceedings International Summer School University of Antwerp, RUCA July 17 -August 3, 1972

Edited by W Kuijk and J-P. Serre

S pringer-Verlag Berlin Heidelberg New York Tokyo

Editors

Willem Kuijk Rijksuniversitair Centrum Antwerpen, Leerstoel Algebra Groenenborgerlaan 171, 2020 Antwerpen, Belgium Jean-Pierre Serre College de France, 11, pl. Marcenn Berthelot 75231 Paris Cedex 05, France

1st Edition 1973 2nd Corrected Printing 1986

Mathematics Subject Classification (1970): 10005, 10025, 10C 15, 14K22, 14K25 ISBN 3-540-06483-4 Springer-Verlag Berlin Heidelberg New York Tokyo ISBN 0-387-06483-4 Springer-Verlag New York Heidelberg Berlin Tokyo

This work is subject to copyright. Atl 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 sim~ar 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 "Verwertungsgesetlschaft Wort", Munich.

© by Springer-Verlag Berlin Heidelberg 1973 Printed in Germany Printing and binding: Beltz Offsetdruck, HemsbachlBergstr. 2146/3140-543210

Preface

This is Volume 3 of the Proceedings of the International Summer School on "Modular functions of one variable and arithmetical applications" which took place at RUCA, Antwerp University, from July 17 to August 3, 1972. It contains papers by P.Cartier-¥.Roy, B.Dwork, N.Katz, J-P.Serre and H.P.F.Swinnerton-Dyer on congruence properties of modular forms, l-adic representations, p-adic modular forms and p-adic zeta functions.

W.Kuyk

J-P.Serre

CONTENTS

H.P.F. SWINNERTON-DYER

B. DWORK

On l-adic representations and congruences for coefficients of modular forms

1

The Up operator of Atkin on modular functions of level 2 with growth conditions

57

N. KATZ

p-adic properties of modular schemes and modular forms

69

J-P. SERRE

Formes modulaires et fonctions zeta p-adiques

191

P. CARTIER-Y. ROY

Certains calculs numeriques relatifs a l'interpolation p-adique des series de Dirichlet

269

Mailing addresses of authors

350

He~~n

e.L.

Siegel gewidmet

ON l-ADIC REPRESENTATIONS AND CONGRUENCES FOR COEFFICIENTS OF MODULAR FORMS

BY H.P.F. SWINNERTON-DYER

International Summer School on Modular Functions Antwerp 1972

SwD-2

2

CONTENTS

1.

Introduction.

p.3

2.

The possible images of Pl.

p.l0

3.

Modular forms mod l.

p.1S

4.

The exceptional primes.

p.26

5.

Congruences modulo powers of l.

p.36

Appendix

p.43

References

p.ss

3

SwD-3

ON l-ADIC REPRESENTATIONS AND CONGRUENCES FOR COEFFICIENTS OF MODULAR FORMS •

1.

Introduction.

The work I shall describe in these lectures has two themes, a classical one going back to Ramanujan (8J and a modern one initiated by Serre and Deligne [3].

(9)

To describe the classical theme, let the unique cusp

form of weight 12 for the full modular group be written (1)

and note that the associated Dirichlet s