English

Estimates for short character sums evaluated at homogeneous polynomials

Number Theory 2025-12-23 v2

Abstract

Let pp be a prime. We prove bounds on short Dirichlet character sums evaluated at a class of homogeneous polynomials in arbitrary dimensions. In every dimension, this bound is nontrivial for sums over boxes with side lengths as short as p1/4+κp^{1/4 + \kappa} for any κ>0\kappa>0. Our methods capitalize on the relationship between characters mod pp and characters over finite field extensions as well as bounds on the multiplicative energy of sets in products of finite fields.

Keywords

Cite

@article{arxiv.2501.12325,
  title  = {Estimates for short character sums evaluated at homogeneous polynomials},
  author = {Rena Chu},
  journal= {arXiv preprint arXiv:2501.12325},
  year   = {2025}
}

Comments

47 pages; v2 aligns with published version

R2 v1 2026-06-28T21:12:42.576Z