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Diophantine approximations on definable sets

Habegger, Philipp. (2016) Diophantine approximations on definable sets. Preprints Fachbereich Mathematik, 2016 (23).

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Abstract

Consider the vanishing locus of a real analytic function on $\mathbb{R}^n$ restricted to $[0,1]^n$. We bound the number of rational points of bounded height that approximate this set very well. Our result is formulated and proved in the context of o-minimal structure which give a general framework to work with sets mentioned above. It complements the theorem of Pila-Wilkie that yields a bound of the same quality for the number of rational points of bounded height that lie on a definable set. We focus our attention on polynomially bounded o-minimal structures, allow algebraic points of bounded degree, and provide an estimate that is uniform over some families of definable sets. We apply these results to study fixed length sums of roots of unity that are small in modulus.
Faculties and Departments:05 Faculty of Science > Departement Mathematik und Informatik > Mathematik > Zahlentheorie (Habegger)
12 Special Collections > Preprints Fachbereich Mathematik
UniBasel Contributors:Habegger, Philipp
Item Type:Preprint
Publisher:Universität Basel
Language:English
Last Modified:22 Apr 2019 14:45
Deposited On:28 Mar 2019 09:51

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