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Distribution of integral division points on the algebraic torus

Habegger, Philipp and Ih, Su-ion. (2019) Distribution of integral division points on the algebraic torus. Transactions of the American Mathematical Society, 371. pp. 357-386.

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Official URL: https://edoc.unibas.ch/59215/

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Abstract

Let K be a number field with algebraic closure ¯K, and let S be a finite set of places of K containing all the infinite ones. Let Γ0 be a finitely generated subgroup of G\textupm(¯K), and let ΓG\textupm(¯K) be the division group attached to Γ0. Here is an illustration of what we will prove in this article. Fix a proper closed subinterval I of [0,) and a nonzero effective divisor D on G\textupm which is not the translate of any torsion divisor on the algebraic torus G\textupm by any point of Γ with height belonging to I.
Then we prove a statement which easily implies that the set of ``integral division points on G\textupm with height near I'', i.e., the set of points of Γ with (standard absolute logarithmic Weil) height in J which are S-integral on G\textupm relative to D, is finite for some fixed subinterval J of [0,) properly containing I. We propose a conjecture on the nondensity of integral division points on semi-abelian varieties with prescribed height values, which generalizes some previously known conjectures as well as this finiteness result for G\textupm. Finally, we also propose an analogous version for a dynamical system on P1.
Faculties and Departments:05 Faculty of Science > Departement Mathematik und Informatik > Mathematik > Zahlentheorie (Habegger)
UniBasel Contributors:Habegger, Philipp
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Mathematical Society
ISSN:0002-9947
e-ISSN:1088-6850
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:24 Jul 2020 13:33
Deposited On:24 Jul 2020 13:33

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