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ON p-ADIC INTERPOLATION IN TWO OF MAHLER’S PROBLEMS

Part of: Diophantine approximation, transcendental number theory Algebraic number theory: local and $p$-adic fields

Published online by Cambridge University Press:  22 September 2022

BRUNO DE PAULA MIRANDA Open the ORCID record for BRUNO DE PAULA MIRANDA [Opens in a new window]  and
JEAN LELIS Open the ORCID record for JEAN LELIS [Opens in a new window]
BRUNO DE PAULA MIRANDA
Affiliation:
Instituto Federal de Goiás, Avenida Saia Velha, Km 6, BR-040, s/n, Parque Esplanada V, Valparaíso de Goiás, GO 72876-601, Brazil e-mail: bruno.miranda@ifg.edu.br
JEAN LELIS*
Affiliation:
Faculdade de Matemática, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, Belém PA, Brazil
*
e-mail: jeanlelis@ufpa.br
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Abstract

Motivated by the p-adic approach in two of Mahler’s problems, we obtain some results on p-adic analytic interpolation of sequences of integers $(u_n)_{n\geq 0}$. We show that if $(u_n)_{n\geq 0}$ is a sequence of integers with $u_n = O(n)$ which can be p-adically interpolated by an analytic function $f:\mathbb {Z}_p\rightarrow \mathbb {Q}_p$, then $f(x)$ is a polynomial function of degree at most one. The case $u_n=O(n^d)$ with $d>1$ is also considered with additional conditions. Moreover, if X and Y are subsets of $\mathbb {Z}$ dense in $\mathbb {Z}_p$, we prove that there are uncountably many p-adic analytic injective functions $f:\mathbb {Z}_p\to \mathbb {Q}_p$, with rational coefficients, such that $f(X)=Y$.

Keywords

p-adic interpolationp-adic analytic functionMahler expansionStrassmann’s theoremp-adic Liouville number

MSC classification

Primary: 11J61: Approximation in non-Archimedean valuations
Secondary: 11S80: Other analytic theory (analogues of beta and gamma functions, $p$-adic integration, etc.)
Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 108 , Issue 1 , August 2023 , pp. 69 - 80
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Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of Australian Mathematical Publishing Association Inc.

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