Exponential and continued fractions (Q1924252)

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scientific article; zbMATH DE number 935005
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Exponential and continued fractions
scientific article; zbMATH DE number 935005

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    Exponential and continued fractions (English)
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    20 July 1997
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    In this nice paper the author studies the continued fraction expansion of the analogues of \({{ae^{2/n}+b} \over {ce^{2/n}+d}}\) in function fields: as usual \(\mathbb{Z}\) is replaced by \(\mathbb{F}_q[x]\), where \(\mathbb{F}_q\) is the field with \(q\) elements, \(\mathbb{Q}\) is replaced by \(\mathbb{F}_q(x)\) and \(\mathbb{R}\) by \(\mathbb{F}_q((X^{-1}))\). The exponential function is replaced by the Carlitz exponential. The author discovers nice patterns in these continued fraction expansions. He also studies some continued fraction expansions coming from analogues of hypergeometric functions [see \textit{D. Thakur}, Finite Fields Appl. 1, 219-231 (1995; Zbl 0838.11043)]. Note that in the references [AM] and [DMP] ``France Mendes'' should be replaced by M. Mendès France. Finally, the author announces he can replace \(2/n\) by \(1/f\) when \(q=2\).
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    Carlitz exponential function
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    continued fraction expansion
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    function fields
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    hypergeometric functions
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