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Asymptotics of multivariate orthogonal polynomials with hyperoctahedral symmetry

J. F. van Diejen

math.CAarXiv:math/0412532

Abstract

We present a formula describing the asymptotics of a class of multivariate orthogonal polynomials with hyperoctahedral symmetry as the degree tends to infinity. The polynomials under consideration are characterized by a factorized weight function satisfying certain analyticity assumptions. As an application, the large-degree asymptotics of the Koornwinder-Macdonald BCN-type multivariate Askey-Wilson polynomials is determined.

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