English

Sets of full measure avoiding Cantor sets

Classical Analysis and ODEs 2023-01-10 v2

Abstract

In relation to the Erd\H os similarity problem (show that for any infinite set AA of real numbers there exists a set of positive Lebesgue measure which contains no affine copy of AA) we give some new examples of infinite sets which are not universal in measure, i.e. they satisfy the above conjecture. These are symmetric Cantor sets CC which can be quite thin: the length of the nn-th generation intervals defining the Cantor set is decreasing almost doubly exponentially. Further, we achieve to construct a set, not just of positive measure, but of \textit{full measure} not containing any affine copy of CC. Our method is probabilistic.

Keywords

Cite

@article{arxiv.2209.10823,
  title  = {Sets of full measure avoiding Cantor sets},
  author = {Mihail N. Kolountzakis},
  journal= {arXiv preprint arXiv:2209.10823},
  year   = {2023}
}

Comments

Minor changes done after the referee's report

R2 v1 2026-06-28T01:52:33.586Z