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    Heine, Hilbert, Padé, Riemann, and Stieltjes: a John

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    Andrei Martinez-Heine.pdf (740.9Kb)
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    URI: http://hdl.handle.net/10835/1589
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    Author/s
    Martínez-Finkelshtein, Andrei; Rakhmanov, Evgenii A.; Suetin, Sergey P.
    Date
    2011
    Abstract
    In 1986 J. Nuttall published in Constructive Approximation the paper "Asymptotics of generalized Jacobi polynomials", where with his usual insight he studied the behavior of the denominators ("generalized Jacobi polynomials") and the remainders of the Pade approximants to a special class of algebraic functions with 3 branch points. 25 years later we try to look at this problem from a modern perspective. On one hand, the generalized Jacobi polynomials constitute an instance of the so-called Heine-Stieltjes polynomials, i.e. they are solutions of linear ODE with polynomial coefficients. On the other, they satisfy complex orthogonality relations, and thus are suitable for the Riemann-Hilbert asymptotic analysis. Along with the names mentioned in the title, this paper features also a special appearance by Riemann surfaces, quadratic differentials, compact sets of minimal capacity, special functions and other characters.
    Palabra/s clave
    John Nuttall
    Jacobi polynomials
    Heine
    Hilbert
    Padé
    Riemann
    Stieltjes
    Polinomios de Jacobi
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