Transverse limits in the Askey tableau (Q1298593)

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scientific article; zbMATH DE number 1326392
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Transverse limits in the Askey tableau
scientific article; zbMATH DE number 1326392

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    Transverse limits in the Askey tableau (English)
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    9 May 2000
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    Limit relations between classical discrete orthogonal polynomials (Charlier, Meixner, Krawtchouk, Hahn) to classical continuous orthogonal polynomials (Jacobi, Laguerre, Hermite) -- so-called tranverse limits -- can be described by relations of type \(\lim_{\omega\rightarrow 0}P_n(x(s,\omega))=Q_n(s)\) where \(P_n(x)\) and \(Q_n(x)\) correspond to the discrete and continuous family, respectively. The authors consider the expansions \(P_n(x(s,\omega))=\sum_{k=0}^\infty R_k(s;n)\omega^k\), and develop a method to compute the coefficients \(R_k(s;n)\) by using certain connection and inversion coefficients.
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    Askey tableau
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    orthogonal polynomials
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    connection problem
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    inversion problem
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    Charlier polynomials
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    Meixner polynomials
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    Krawtchouk polynomials
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    Hahn polynomials
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    Gram polynomials
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    Jacobi polynomials
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    Laguerre polynomials
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    Hermite polynomials
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