Comptes Rendus
Group Theory/Number Theory
Estimates for the number of sums and products and for exponential sums over subgroups in fields of prime order
[Estimes sommes–produits et sur les sommes exponentielles associées à des sous-groupes d'un corps d'ordre premier]
Comptes Rendus. Mathématique, Volume 337 (2003) no. 2, pp. 75-80.

Notre premier résultat est un théorème « sommes–produits » pour des sous-ensembles A d'un corps fini 𝔽 p , p un nombre premier, donnant une minoration du max(|A+A|,|A·A|). Comme corollaire et résultat principal, on en déduit de nouvelles bornes sur les sommes exponentielles associées à des sous-groupes du groupe multiplicatif 𝔽 p * .

Our first result is a ‘sum–product’ theorem for subsets A of the finite field 𝔽 p , p prime, providing a lower bound on max(|A+A|,|A·A|). As corollary, the second and main result provides new bounds on exponential sums associated to subgroups of the multiplicative group 𝔽 p * .

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/S1631-073X(03)00281-4

Jean Bourgain 1, 2 ; S.V. Konyagin 3

1 School of Mathematics, Institute for Advanced Study, Princeton, NJ 08540, USA
2 Department of Mathematics, University of Illinois, Urbana, IL 61801, USA
3 Department of Mechanics and Mathematics, Moscow State University, Moscow 119992, Russia
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Jean Bourgain; S.V. Konyagin. Estimates for the number of sums and products and for exponential sums over subgroups in fields of prime order. Comptes Rendus. Mathématique, Volume 337 (2003) no. 2, pp. 75-80. doi : 10.1016/S1631-073X(03)00281-4. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/S1631-073X(03)00281-4/

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