English

Pad\'{e} approximations for products of functions

Number Theory 2025-11-14 v1

Abstract

In this article, we construct new Pad\'{e} approximations for the \emph{product} of binomial functions and powers of logarithmic functions. While several explicit Pad\'{e} approximants are known for powers of exponential functions, binomial functions, and logarithmic functions individually, an explicit Pad\'{e} construction for the product of these functions has not yet been directly achieved. Our main result yields arithmetic applications, providing new linear independence measures for linear forms in (1+α)ωilogji(1+α)(1+\alpha)^{\omega_i}\log^{j_i}(1+\alpha) for 1im1 \le i \le m and 0jiri10 \le j_i \le r_i - 1, where 0<m,r1,,rmZ10 < m, r_1, \ldots, r_m \in \mathbb{Z}_{\geq 1}, ω1,,ωmQ\omega_1, \ldots, \omega_m \in \mathbb{Q}, and 0ω1<<ωm<10 \le \omega_1 < \cdots < \omega_m < 1. These results hold with algebraic coefficients in both the complex and pp-adic cases. Additionally, we establish that Pad\'{e} approximation of a single polylogarithm is, in general, perfect.

Keywords

Cite

@article{arxiv.2511.10057,
  title  = {Pad\'{e} approximations for products of functions},
  author = {Makoto Kawashima},
  journal= {arXiv preprint arXiv:2511.10057},
  year   = {2025}
}

Comments

24 pages

R2 v1 2026-07-01T07:35:14.927Z