English

Subsets of $\mathbb{F}^*_p$ with only small products or ratios

Number Theory 2019-04-18 v1

Abstract

Let pp be a fixed prime. We estimate the number of elements of a set AFpA \subseteq \mathbb{F}^*_p for which s1s2a(modp)\mboxforsomea[X,X]\mboxforalls1,s2A. s_1s_2 \equiv a \pmod{p} \quad \mbox{for some}\quad a \in [-X,X] \quad \mbox{for all}\quad s_1,s_2 \in A. We also consider variations and generalizations.

Keywords

Cite

@article{arxiv.1904.08234,
  title  = {Subsets of $\mathbb{F}^*_p$ with only small products or ratios},
  author = {Patrick Letendre},
  journal= {arXiv preprint arXiv:1904.08234},
  year   = {2019}
}