Limits of multivariate elliptic hypergeometric biorthogonal functions

Details Limits of multivariate elliptic hypergeometric biorthogonal functions Limits of multivariate elliptic hypergeometric biorthogonal functions

2011-10-07

arxiv.org/abs/1110.1458v1

Mathematics

Classical Analysis and ODEs

29 pages. This is part 2 of a 3 part series on limits of multivariate elliptic hypergeometric biorthogonal functions. It is re

Scientific paper

In this article we extend the results of our article "Limits of elliptic hypergeometric biorthogonal functions" to the multivariate setting. In that article we determined which families of biorthogonal functions arise as limits from the elliptic hypergeometric biorthogonal functions from Spiridonov when p->0. Here we show that the classification of the possible limits of the BC_n type multivariate biorthogonal functions previously introduced by the second author is identical to the univariate classification. That is, for each univariate limit family there exists a multivariate extension, and in particular we obtain multivariate versions for all elements of the q-Askey scheme. For the Askey-Wilson polynomials these are the Koornwinder polynomials, and the multivariate versions of the Pastro polynomials form a two-parameter family which include the Macdonald polynomials.

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