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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,.
Received: 15.10.2023 Accepted: 21.12.2023
Citation:
V. G. Chirskii, “Transcendence of certain $2$-adic numbers”, Chebyshevskii Sb., 24:5 (2023), 237–243
Linking options:
https://www.mathnet.ru/eng/cheb1387 https://www.mathnet.ru/eng/cheb/v24/i5/p237
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