English

Galois orbits of torsion points near atoral sets

Number Theory 2024-10-23 v2

Abstract

We prove that the Galois equidistribution of torsion points of the algebraic torus Gmd\mathbb{G}_{m}^d extends to the singular test functions of the form logP\log{|P|}, where PP is a Laurent polynomial having algebraic coefficients that vanishes on the unit real dd-torus in a set whose Zariski closure in Gmd\mathbb{G}_m^d has codimension at least 22. Our result includes a power saving quantitative estimate of the decay rate of the equidistribution. It refines an ergodic theorem of Lind, Schmidt, and Verbitskiy, of which it also supplies a purely Diophantine proof. As an application, we confirm Ih's integrality finiteness conjecture on torsion points for a class of atoral divisors of Gmd\mathbb{G}_m^d.

Keywords

Cite

@article{arxiv.1909.06051,
  title  = {Galois orbits of torsion points near atoral sets},
  author = {Vesselin Dimitrov and Philipp Habegger},
  journal= {arXiv preprint arXiv:1909.06051},
  year   = {2024}
}

Comments

New reference, fixed Lemma A.3(i), various minor changes