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Improved Bounds on the Dimensions of Sets that Avoid Approximate Arithmetic Progressions
Journal of Fourier Analysis and Applications ( IF 1.2 ) Pub Date : 2021-02-10 , DOI: 10.1007/s00041-020-09807-w
Jonathan M. Fraser , Pablo Shmerkin , Alexia Yavicoli

We provide quantitative estimates for the supremum of the Hausdorff dimension of sets in the real line which avoid \(\varepsilon \)-approximations of arithmetic progressions. Some of these estimates are in terms of Szemerédi bounds. In particular, we answer a question of Fraser, Saito and Yu (IMRN 14:4419–4430, 2019) and considerably improve their bounds. We also show that Hausdorff dimension is equivalent to box or Assouad dimension for this problem, and obtain a lower bound for Fourier dimension.



中文翻译:

避免近似算术级数的集合维上的改进边界

我们为实线中集合的Hausdorff维数的最大值提供了定量估计,从而避免了\(\ varepsilon \) -算术级数的逼近。其中一些估计是根据Szemerédi界线。尤其是,我们回答了弗雷泽(Fraser),斋藤(Saito)和尤(Yu)的问题(IMRN 14:4419–4430,2019),并大大改善了他们的界限。我们还表明,对于这个问题,Hausdorff维数等于Box或Assouad维数,并获得Fourier维数的下界。

更新日期:2021-02-10
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