Some cubic birth and death processes and their related orthogonal polynomials
Jacek Gilewicz, Elie Leopold, Andreas Ruffing, Galliano Valent
Abstract
The orthogonal polynomials with recurrence relation \[(\n+μ\n-z) F\n(z)=μ\n+1 F\n+1(z)+\n-1 F\n-1(z)\] with two kinds of cubic transition rates \n and μ\n, corresponding to indeterminate Stieltjes moment problems, are analyzed. We derive generating functions for these two classes of polynomials, which enable us to compute their Nevanlinna matrices. We discuss the asymptotics of the Nevanlinna matrices in the complex plane.
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