A new approach to the theory of classical hypergeometric polynomials
Authors:
José Manuel Marco and Javier Parcet
Journal:
Trans. Amer. Math. Soc. 358 (2006), 183214
MSC (2000):
Primary 33D15, 33D45
Published electronically:
December 28, 2004
MathSciNet review:
2171229
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Abstract: In this paper we present a unified approach to the spectral analysis of a hypergeometric type operator whose eigenfunctions include the classical orthogonal polynomials. We write the eigenfunctions of this operator by means of a new Taylor formula for operators of AskeyWilson type. This gives rise to some expressions for the eigenfunctions, which are unknown in such a general setting. Our methods also give a general Rodrigues formula from which several wellknown formulas of Rodriguestype can be obtained directly. Moreover, other new Rodriguestype formulas come out when seeking for regular solutions of the associated functional equations. The main difference here is that, in contrast with the formulas appearing in the literature, we get nonramified solutions which are useful for applications in combinatorics. Another fact, that becomes clear in this paper, is the role played by the theory of elliptic functions in the connection between ramified and nonramified solutions.
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Additional Information
José Manuel Marco
Affiliation:
Department of Mathematics, Universidad Autónoma de Madrid, Madrid 28049, Spain
Javier Parcet
Affiliation:
Department of Mathematics, Universidad Autónoma de Madrid, Madrid 28049, Spain
Email:
javier.parcet@uam.es
DOI:
http://dx.doi.org/10.1090/S0002994704036207
PII:
S 00029947(04)036207
Keywords:
Psequence,
hypergeometric operator,
Taylor and Rodrigues formula
Received by editor(s):
July 17, 2003
Received by editor(s) in revised form:
January 8, 2004
Published electronically:
December 28, 2004
Article copyright:
© Copyright 2004
American Mathematical Society
