English

Cubes from products of terms in progression with one term missing

Number Theory 2025-12-22 v1

Abstract

Let 5k115 \leq k \leq 11 and 0ik10\leq i \leq k-1 be integers. We determine all solutions to the equation \begin{align*} n(n+d)(n+2d)\cdots(n+(i-1)d)(n+(i+1)d) \cdots (n+(k-1)d) = y^3 \end{align*} in integers n,d,yn,d,y with ny0ny \neq 0, d1d\geq 1, and gcd(n,d)=1\text{gcd}(n,d) = 1. Our method relies on the theory of elliptic curves, including elliptic curve Chabauty over a number field. As an application, we answer a question of Das, Laishram, Saradha, and Sharma concerning rational points on a certain superelliptic curve.

Keywords

Cite

@article{arxiv.2512.17821,
  title  = {Cubes from products of terms in progression with one term missing},
  author = {Kyle Pratt},
  journal= {arXiv preprint arXiv:2512.17821},
  year   = {2025}
}

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13 pages