English

Ill-distributed sets over global fields and exceptional sets in Diophantine Geometry

Number Theory 2023-07-03 v2 Combinatorics

Abstract

Let KRK\subseteq \mathbb{R} be a number field. Using techniques of discrete analysis, we prove that for definable sets XX in Rexp\mathbb{R}_{\exp} of dimension at most 22 a conjecture of Wilkie about the density of rational points is equivalent to the fact that XX is badly distributed at the level of residue classes for many primes of KK. This provides a new strategy to prove this conjecture of Wilkie. In order to prove this result, we are lead to study an inverse problem as in the works \cite{Walsh2, Walsh}, but in the context of number fields, or more generally global fields. Specifically, we prove that if KK is a global field, then every subset SPn(K)S\subseteq \mathbb{P}^{n}(K) consisting of rational points of projective height bounded by NN, occupying few residue classes modulo p\mathfrak{p} for many primes p\mathfrak{p} of KK, must essentially lie in the solution set of a polynomial equation of degree (log(N))C\ll (\log(N))^{C}, for some constant CC.

Keywords

Cite

@article{arxiv.1901.00562,
  title  = {Ill-distributed sets over global fields and exceptional sets in Diophantine Geometry},
  author = {Marcelo Paredes},
  journal= {arXiv preprint arXiv:1901.00562},
  year   = {2023}
}

Comments

Final version. To appear in Acta Arithmetica. 25 pages

R2 v1 2026-06-23T07:01:51.949Z