Characterization of classical orthogonal polynomials in two continuous variables
Classical Analysis and ODEs
2026-05-20 v4
Abstract
For a family of polynomials in two continuous variables, orthogonal with respect to a weight function, we prove, under suitable conditions, the equivalence of the following properties: the matrix Pearson equation of the weight, the second order linear partial differential equation, the orthogonality of the gradients, the matrix Rodrigues formula involving tensor products of matrices, and the so-called first structure relation. We then introduce a notion of classical orthogonal polynomials in two variables and relate the corresponding theory for weight functions and moment functionals. Finally, we present a nontrivial example that illustrates and delineates our contribution to the field.
Cite
@article{arxiv.2407.06995,
title = {Characterization of classical orthogonal polynomials in two continuous variables},
author = {Maurice Kenfack Nangho and Kerstin Jordaan and Bleriod Jiejip Nkwamouo},
journal= {arXiv preprint arXiv:2407.06995},
year = {2026}
}