An addition formula, Pythagorean identity, and generating function are obtained for orthogonal homogeneous polynomials of several real variables. Application is made to the study of series of such polynomials. Results include an analog of the Funk-Hecke theorem.
Properties of Multivariate Homogeneous Orthogonal Polynomials
β Scribed by Brahim Benouahmane; Annie Cuyt
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 165 KB
- Volume
- 113
- Category
- Article
- ISSN
- 0021-9045
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β¦ Synopsis
It is well-known that the denominators of Pade approximants can be considered as orthogonal polynomials with respect to a linear functional. This is usually shown by defining Pade -type approximants from so-called generating polynomials and then improving the order of approximation by imposing orthogonality conditions on the generating polynomials.
In the multivariate case, a similar construction is possible when dealing with the multivariate homogeneous Pade approximants introduced by the second author. Moreover it is shown here, that several well-known properties of the zeroes of classical univariate orthogonal polynomials, in the case of a definite linear functional, generalize to the multivariate homogeneous case. For the multivariate homogeneous orthogonal polynomials, the absence of common zeroes is translated to the absence of common factors.
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This paper deals with Hermite Pade polynomials in the case where the multiple orthogonality condition is related to semiclassical functionals. The polynomials, introduced in such a way, are a generalization of classical orthogonal polynomials (Jacobi, Laguerre, Hermite, and Bessel polynomials). They
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