English

Euler's factorial series at algebraic integer points

Number Theory 2018-10-01 v1

Abstract

We study a linear form in the values of Euler's series F(t)=n=0n!tnF(t)=\sum_{n=0}^\infty n!t^n at algebraic integer points α1,,αmZK\alpha_1, \ldots, \alpha_m \in \mathbb{Z}_{\mathbb{K}} belonging to a number field K\mathbb{K}. Let vpv|p be a non-Archimedean valuation of K\mathbb{K}. Two types of non-vanishing results for the linear form Λv=λ0+λ1Fv(α1)++λmFv(αm)\Lambda_v = \lambda_0 + \lambda_1 F_v(\alpha_1) + \ldots + \lambda_m F_v(\alpha_m), λiZK\lambda_i \in \mathbb{Z}_{\mathbb{K}}, are derived, the second of them containing a lower bound for the vv-adic absolute value of Λv\Lambda_v. The first non-vanishing result is also extended to the case of primes in residue classes. On the way to the main results, we present explicit Pad\'e approximations to the generalised factorial series n=0(k=0n1P(k))tn\sum_{n=0}^\infty \left( \prod_{k=0}^{n-1} P(k) \right) t^n, where P(x)P(x) is a polynomial of degree one.

Keywords

Cite

@article{arxiv.1809.10997,
  title  = {Euler's factorial series at algebraic integer points},
  author = {Louna Seppälä},
  journal= {arXiv preprint arXiv:1809.10997},
  year   = {2018}
}
R2 v1 2026-06-23T04:21:57.632Z