Algebraic independence of values of hypergeometric \(E\)-functions (Q1916583)
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scientific article; zbMATH DE number 898895
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Algebraic independence of values of hypergeometric \(E\)-functions |
scientific article; zbMATH DE number 898895 |
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Algebraic independence of values of hypergeometric \(E\)-functions (English)
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15 April 1997
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Let \(t\geq 1\), \(l\geq 0\) be integers and \(S=\{\nu_1, \dots, \nu_l; \lambda_1, \dots, \lambda_{t+1}\}\) a set of rational numbers. We denote \[ F_S(z)= \sum_{n\geq 0} {(\nu_1 )_n \cdots (\nu_l)_n \over (\lambda_1)_n \cdots (\lambda_{t+1})_n} \left( {z \over n} \right)^{tn}. \] Using techniques from [\textit{F. Beukers}, \textit{W. D. Brownawell}, and \textit{G. Heckman}, Ann. Math. 127, 279-308 (1988; Zbl 0652.10027)] and [\textit{V. Kh. Salikhov}, Acta Arith. 53, No. 5, 453-471 (1990; Zbl 0831.11037)] the author proves algebraic independence over \(\mathbb{Q}\) of the numbers \[ F_{S_1} (\alpha_1), \dots, F_{S_1}^{(t_1+ l_1-1)} (\alpha_1),\;F_{S_2} (\alpha_2), \dots, F_{S_k}^{(t_k+l_k-1)} (\alpha_k) \] for a large set of choices of sets \(S_i\) and non-zero algebraic numbers \(\alpha_i\). The author thereby extends earlier results of Salikhov and it seems that he found the most general statement possible in this direction. While reading the English translation one should bear in mind the author's idea of an irreducible differential equation, i.e. factorisable over \(\mathbb{C}(z)\).
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values of hypergeometric \(E\)-functions
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transcendence
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algebraic independence
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0.9887094
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0.9844348
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0.97291094
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0.96821034
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