© 2002 by London Mathematical Society
© The London Mathematical Society
Restricted addition in Z/nZ and an Application to the Erd
sGinzburgZiv Problem
Département de Mathématiques, Université de Brest 6 Avenue Le Gorgeu, 29285 Brest Cedex, France, luis.gallardo{at}univ-brest.fr
Université de Saint-Etienne, Déepartement de Mathématiques 23 rue du Dr Paul Michelon, 42023 Saint-Etienne Cedex 2, France, grekos{at}univ-st-etienne.fr
A2X, UMR 5465 CNRS, Université Bordeaux 1 351 cours de la Libération, 33405 Talence Cedex, France, habsiege{at}math.u-bordeaux.fr
A2X, UMR 5465 CNRS, Université Bordeaux 1 351 cours de la Libération, 33405 Talence Cedex, France, hennec{at}math.u-bordeaux.fr
A2X, UMR 5465 CNRS, Université Bordeaux 1 351 cours de la Libération, 33405 Talence Cedex, France, landreau{at}math.u-bordeaux.fr
LIX, École Polytechnique 91128 Palaiseau Cedex, France, plagne{at}lix.polytechnique.fr
Received 2 April 2001. Revision received 16 October 2001.
Some elementary results are given on restricted sums 2
A and 3
A of a subset A
Z/nZ in the case when the cardinality of A, is close to n/2. In the last section, some of these results are used to derive some new values of a function related to the Erd
sGinzburgZiv problem.