Propriétés algébriques et analytiques de certaines suites indexées par les nombres premiers

Abstract : In the first part of this Thesis, we study the sequence NX (p) [mod p] where X is a reduced separated scheme of finite type over Z,and NX (p) is the number of Fp-points of the reduction modulo p of X, for every prime p. Under some hypotheses on the geometry of X, we give a simple condition to ensure that this sequence is distinctat a positive proportion of indices from the zero sequence,or generalizations obtained by reduction modulo p of finitely many integers.We give a bound on average over a family of hyperelliptic curves for the least prime p such that NX (p) [mod p] avoids the reductionmodulo p of finitely many fixed integers.The second part deals with generalizations of Chebyshev’s bias.We consider an L-function satisfying some analytic properties that generalize those satisfied by Dirichlet L-functions.We study the sequence of coefficients a_p as p runs through the set of prime numbers.Precisely, we study the sign of the summatory function of the Fourier coefficients of the L-function.Under some classical conditions, we show that this function admits a limiting logarithmic distribution.Under stronger hypotheses, we prove regularity, symmetry and get information about the support of this distribution.
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Lucile Devin. Propriétés algébriques et analytiques de certaines suites indexées par les nombres premiers. Théorie des nombres [math.NT]. Université Paris-Saclay, 2017. Français. ⟨NNT : 2017SACLS139⟩. ⟨tel-01559293⟩

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