Definability of complex functions in o-minimal structures

Fuente: arXiv
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Autori principali: Padgett, Adele, Speissegger, Patrick
Natura: Preprint
Pubblicazione: 2025
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author Padgett, Adele
Speissegger, Patrick
author_facet Padgett, Adele
Speissegger, Patrick
contents We prove that some holomorphic continuations of functions in the classes $\mathbf{an}^*$ and $\mathcal{G}$ are definable in the o-minimal structures $\mathbb{R}_{\mathrm{an}^*}$ and $\mathbb{R}_{\mathcal{G}}$ respectively. More specifically, we give complex domains on which the holomorphic continuations are definable, and show they are optimal. As an application, we describe optimal domains on which the Riemann $ζ$ function is definable in o-minimal expansions of $\mathbb{R}_{\mathrm{an}^*,\exp}$ and on which the $Γ$ function is definable in o-minimal expansions of $\mathbb{R}_{\mathcal{G},\exp}$.
format Preprint
id arxiv_https___arxiv_org_abs_2506_15119
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Definability of complex functions in o-minimal structures
Padgett, Adele
Speissegger, Patrick
Logic
03C64, 32D15, 03C40, 32B20
We prove that some holomorphic continuations of functions in the classes $\mathbf{an}^*$ and $\mathcal{G}$ are definable in the o-minimal structures $\mathbb{R}_{\mathrm{an}^*}$ and $\mathbb{R}_{\mathcal{G}}$ respectively. More specifically, we give complex domains on which the holomorphic continuations are definable, and show they are optimal. As an application, we describe optimal domains on which the Riemann $ζ$ function is definable in o-minimal expansions of $\mathbb{R}_{\mathrm{an}^*,\exp}$ and on which the $Γ$ function is definable in o-minimal expansions of $\mathbb{R}_{\mathcal{G},\exp}$.
title Definability of complex functions in o-minimal structures
topic Logic
03C64, 32D15, 03C40, 32B20
url https://arxiv.org/abs/2506.15119