Parabolic distance in $\mathbb F_q^2$: a sharp exponent and new results
Combinatorics
2026-03-24 v1
Abstract
We study the parabolic variant of the Erd\H os--Falconer distance problem in finite fields. That is, if is odd, we seek size thresholds beyond which any subset will determine many distinct parabolic distances. This problem has a rich history because the parabolic distance functional shares many properties with the standard distance functional, but exhibits many distinct behaviors. Here we begin with rather standard Fourier analytic arguments, but diverge into additive combinatorics to handle the central obstructions. We provide a suite of positive results and corresponding sharpness examples.
Keywords
Cite
@article{arxiv.2603.21292,
title = {Parabolic distance in $\mathbb F_q^2$: a sharp exponent and new results},
author = {Dao Nguyen Van Anh and Steven Senger and Dung The Tran and Le Anh Vinh},
journal= {arXiv preprint arXiv:2603.21292},
year = {2026}
}