Irrationality and transcendence questions in the "poor man's adèle ring"

Fuente: arXiv
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Autores principales: Luca, Florian, Zudilin, Wadim
Formato: Preprint
Publicado: 2025
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author Luca, Florian
Zudilin, Wadim
author_facet Luca, Florian
Zudilin, Wadim
contents We discuss arithmetic questions related to the "poor man's adèle ring" $\mathcal A$ whose elements are encoded by sequences $(t_p)_p$ indexed by prime numbers, with each $t_p$ viewed as a residue in $\mathbb Z/p\mathbb Z$. Our main theorem is about the $\mathcal A$-transcendence of the element $(F_p(q))_p$, where $F_n(q)$ (Schur's $q$-Fibonacci numbers) are the $(1,1)$-entries of $2\times2$-matrices $$ \bigg(\begin{matrix} 1 & 1 \\ 1 & 0 \end{matrix}\bigg) \bigg(\begin{matrix} 1 & 1 \\ q & 0 \end{matrix}\bigg) \bigg(\begin{matrix} 1 & 1 \\ q^2 & 0 \end{matrix}\bigg) \cdots \bigg(\begin{matrix} 1 & 1 \\ q^{n-2} & 0 \end{matrix}\bigg) $$ and $q>1$ is an integer. This result was previously known for $q>1$ square free under the GRH.
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institution arXiv
publishDate 2025
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spellingShingle Irrationality and transcendence questions in the "poor man's adèle ring"
Luca, Florian
Zudilin, Wadim
Number Theory
11J81 (primary), 11A41, 11J72, 11B39, 11B68, 16U10 (secondary)
We discuss arithmetic questions related to the "poor man's adèle ring" $\mathcal A$ whose elements are encoded by sequences $(t_p)_p$ indexed by prime numbers, with each $t_p$ viewed as a residue in $\mathbb Z/p\mathbb Z$. Our main theorem is about the $\mathcal A$-transcendence of the element $(F_p(q))_p$, where $F_n(q)$ (Schur's $q$-Fibonacci numbers) are the $(1,1)$-entries of $2\times2$-matrices $$ \bigg(\begin{matrix} 1 & 1 \\ 1 & 0 \end{matrix}\bigg) \bigg(\begin{matrix} 1 & 1 \\ q & 0 \end{matrix}\bigg) \bigg(\begin{matrix} 1 & 1 \\ q^2 & 0 \end{matrix}\bigg) \cdots \bigg(\begin{matrix} 1 & 1 \\ q^{n-2} & 0 \end{matrix}\bigg) $$ and $q>1$ is an integer. This result was previously known for $q>1$ square free under the GRH.
title Irrationality and transcendence questions in the "poor man's adèle ring"
topic Number Theory
11J81 (primary), 11A41, 11J72, 11B39, 11B68, 16U10 (secondary)
url https://arxiv.org/abs/2505.09775