English

Cantor series constructions of sets of normal numbers

Number Theory 2014-03-25 v2

Abstract

Let Q=(qn)n=1Q=(q_n)_{n=1}^{\infty} be a sequence of integers greater than or equal to 2. We say that a real number xx in [0,1)[0,1) is {\it QQ-distribution normal} if the sequence (q1q2...qnx)n=1(q_1q_2... q_n x)_{n=1}^{\infty} is uniformly distributed mod 1. In \cite{Lafer}, P. Lafer asked for a construction of a QQ-distribution normal number for an arbitrary QQ. Under a mild condition on QQ, we construct a set ΘQ\Theta_Q of QQ-distribution normal numbers. This set is perfect and nowhere dense. Additionally, given any α\alpha in [0,1][0,1], we provide an explicit example of a sequence QQ such that the Hausdorff dimension of ΘQ\Theta_Q is equal to α\alpha. Under a certain growth condition on qnq_n, we provide a discrepancy estimate that holds for every xx in ΘQ\Theta_Q.

Keywords

Cite

@article{arxiv.1010.2782,
  title  = {Cantor series constructions of sets of normal numbers},
  author = {Bill Mance},
  journal= {arXiv preprint arXiv:1010.2782},
  year   = {2014}
}

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29 pages