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On a generalization of the Brocard--Ramanujan Diophantine equation

Number Theory 2026-02-11 v1

Abstract

Let Q1,...,QrZ[x]Q_1,...,Q_r\in \mathbb{Z}[x] be polynomials having 00 as a root. Let f(x,y)Z[x,y]f(x,y)\in\mathbb{Z}[x,y] be a homogeneous polynomial with factorization f(x,y)=f1(x,y)e1fu(x,y)euf(x,y)=f_1(x,y)^{e_1}\cdots f_u(x,y)^{e_u}, where fi(x,y)f_i(x,y) are irreducible homogeneous polynomials of degree di2d_i\geq 2. Fix some positive integers A1,...,ArA_1,...,A_r. We show that under certain conditions, the diophantine equation i=1rQi(Ainini!)=f(x,y)\prod_{i=1}^rQ_i(A_i^{n_i}n_i!)=f(x,y) has finitely many integer solutions.

Keywords

Cite

@article{arxiv.2602.09687,
  title  = {On a generalization of the Brocard--Ramanujan Diophantine equation},
  author = {Saša Novaković},
  journal= {arXiv preprint arXiv:2602.09687},
  year   = {2026}
}

Comments

8 pages, comments are welcome!