English

Local divisor correlations in almost all short intervals

Number Theory 2025-03-06 v1

Abstract

Let k,l2 k,l \geq 2 be natural numbers, and let dk,dld_k,d_l denote the kk-fold and ll-fold divisor functions, respectively. We analyse the asymptotic behavior of the sum x<nx+H1dk(n)dl(n+h)\sum_{x<n\leq x+H_1}d_k(n)d_l(n+h). More precisely, let ε>0\varepsilon>0 be a small fixed number and let Φ(x)\Phi(x) be a positive function that tends to infinity arbitrarily slowly as xx\to \infty. We then show that whenever H1(logx)Φ(x)H_1\geq(\log x)^{\Phi(x)} and (logx)1000klogkH2H11ε(\log x)^{1000k\log k}\leq H_2\leq H_1^{1-\varepsilon }, the expected asymptotic formula holds for almost all x[X,2X]x\in[X,2X] and almost all 1hH21\leq h\leq H_2.

Keywords

Cite

@article{arxiv.2503.02962,
  title  = {Local divisor correlations in almost all short intervals},
  author = {Javier Pliego and Yu-Chen Sun and Mengdi Wang},
  journal= {arXiv preprint arXiv:2503.02962},
  year   = {2025}
}

Comments

36 pages. Comments welcome

R2 v1 2026-06-28T22:07:01.054Z