Non-Salem Sets in Metric Diophantine Approximation

Publication Date

7-1-2023

Document Type

Article

Publication Title

International Mathematics Research Notices

Volume

2023

Issue

15

DOI

10.1093/imrn/rnac206

First Page

13136

Last Page

13152

Abstract

A classical result of Kaufman states that, for each τ > 1, the set of τ-well approximable numbers {equation presented} is a Salem set. A natural question to ask is whether the same is true for the sets of τ -well approximable n × d matrices when nd > 1 and t > d/n. We prove the answer is no by computing the Fourier dimension of these sets. In addition, we show that the set of badly approximable n × d matrices is not Salem when nd > 1. The case of nd = 1, that is, the badly approximable numbers, remains unresolved.

Funding Number

803711

Funding Sponsor

Horizon 2020 Framework Programme

Department

Mathematics and Statistics

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