BRIEF MESSAGES
Transcendence of certain $2$-adic numbers
V. G. Chirskiiab a Russian Presidential Academy of National Economy and Public Administration (Moscow)
b Lomonosov Moscow State University (Moscow)
Abstract:
We prove here that at least one of the two 2-adic numbers which are the values at
$z=1$ of the sums in
$ \mathbb{\mathrm{Q}}_2 $ of the series
$$ f_{0}(\lambda)=\sum_{n=0}^\infty (\lambda)_{n}\lambda^{n}, f_{1}(\lambda)=\sum_{n=0}^\infty (\lambda +1)_{n}\lambda^{n},$$
where
$ \lambda $ is a certain polyadic Liouville number. The series considered converge in any field
$ \mathbb{\mathrm{Q}}_p $ .We deal here with
$ \mathbb{\mathrm{Q}}_2 $. The symbol
$(\gamma)_{n}$ denotes Pochhammer symbol, i.e.
$(\gamma)_{0}=1$ , and for
$n\geq 1$ we have
$ (\gamma)_{n}=\gamma(\gamma+1)...(\gamma+n-1)$. The values of these series were also calculated at polyadic Liouville number. The canonic expansion of a polyadic number
$\lambda$ is of the form
$$ \lambda= \sum_{n=0}^\infty a_{n} n!, a_{n}\in\mathbb{\mathrm{Z}}, 0\leq a_{n}\leq n.$$
This series converges in any field of
$p-$ adic numbers
$ \mathbb{\mathrm{Q}}_p $ . We call a polyadic number
$\lambda$ a polyadic Liouville number, if for any
$n$ and
$P$ there exists a positive integer
$A$ such that for all primes
$p$ ,satisfying
$p\leq P$ the inequality
$$\left|\lambda -A \right|_{p}<|A|^{-n}$$
holds. It was proved earlier that the Liouville polyadic number is transcendental in any field
$\mathbb{\mathrm{Q}}_p.$ In other words,the Liouville polyadic number is globally transcendental. It allowed to prove using some equality that there exists an infinite set of
$p-$adic fields
$ \mathbb{\mathrm{Q}}_p $ where at least one of the numbers
$f_{0}(z),f_{1}(z).$ Here we prove the transcendence of values in the field
$ \mathbb{\mathrm{Q}}_2 $.
Keywords:
transcendence, polyadic number, polyadic Liouville number,.
UDC:
511.36 Received: 15.10.2023
Accepted: 21.12.2023
DOI:
10.22405/2226-8383-2023-24-5-237-243