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An application of the theory of residues of functions of a complex variable. (Q1516705)

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scientific article; zbMATH DE number 2670853
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English
An application of the theory of residues of functions of a complex variable.
scientific article; zbMATH DE number 2670853

    Statements

    An application of the theory of residues of functions of a complex variable. (English)
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    1898
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    Bezeichnen \(a_0\), \(a_1\), \(a_2\) Functionen eines Parameters \(\xi\), ferner \(\mu\) eine beliebige Constante und \(z\) eine complexe Variable, so stellen die Coefficienten \(Z_{\mu,n}\), resp. \(Z_n\) des allgemeinen Gliedes in der Entwickelung von \((a_0z^2+a_1z+a_2)^\mu\), resp. \(\lg(a_0z^2+a_1z+a_2)\) nach ganzen positiven Potenzen von \(z\) gewisse Functionen von \(\xi\) vor, die als ganz speciellen Fall die Legendre'sche Kugelfunction \(X_n(\xi)\) umfassen. Die Functionen \(Z_{\mu,n}\) und \(Z_n\) fasst der Verf. in bekannter Weise als Canchy'sche Residuen auf. Durch Anwendung des Cauchy'schen Integralsatzes findet der Verf. sodann eine Fülle von Integraldarstellungen und Entwicklungen der Functionen \(Z_{\mu,n}\) und \(Z_n\).
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    The coefficients in the expansions of \((a_0z^2+a_1z+a_2)^\mu\) and \(\lg(a_0z^2+a_1z+a_2)\)
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