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JOURNALS // Zapiski Nauchnykh Seminarov POMI // Archive

Zap. Nauchn. Sem. POMI, 2005 Volume 322, Pages 107–124 (Mi znsl396)

This article is cited in 13 papers

Approximations to $q$-logarithms and $q$-dilogarithms, with applications to $q$-zeta values

W. Zudilin

M. V. Lomonosov Moscow State University

Abstract: We construct simultaneous rational approximations to the $q$-series $L_1(x_1;q)$ and $L_1(x_2;q)$, and, if $x=x_1=x_2$, to the series $L_1(x;q)$ and $L_2(x;q)$, where
\begin{gather*} L_1(x;q)=\sum_{n=1}^\infty\frac{(xq)^n}{1-q^n}=\sum_{n=1}^\infty\frac{xq^n}{1-xq^n}, \\ L_2(x;q)=\sum_{n=1}^\infty\frac{n(xq)^n}{1-q^n}=\sum_{n=1}^\infty\frac{xq^n}{(1-xq^n)^2}. \end{gather*}
Applying the construction, we obtain quantitative linear independence over $\mathbb Q$ of the numbers in the following collections: $1$, $\zeta_q(1)=L_1(1;q)$, $\zeta_{q^2}(1)$, and $1$, $\zeta_q(1)$, $\zeta_q(2)=L_2(1;q)$ for $q=1/p$, $p\in\mathbb Z\setminus\{0,\pm1\}$.

UDC: 519.68

Received: 24.12.2004

Language: English


 English version:
Journal of Mathematical Sciences (New York), 2006, 137:2, 4673–4683

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