English

Sharp density bounds on the finite field Kakeya problem

Combinatorics 2021-12-14 v2

Abstract

A Kakeya set in Fqn\mathbb{F}_q^n is a set containing a line in every direction. We show that every Kakeya set in Fqn\mathbb{F}_q^n has density at least 1/2n11/2^{n-1}, matching the construction by Dvir, Kopparty, Saraf and Sudan.

Keywords

Cite

@article{arxiv.2108.00074,
  title  = {Sharp density bounds on the finite field Kakeya problem},
  author = {Boris Bukh and Ting-Wei Chao},
  journal= {arXiv preprint arXiv:2108.00074},
  year   = {2021}
}

Comments

9 pages, 1 figure

R2 v1 2026-06-24T04:42:17.776Z