Orthogonal polynomials on domains of revolution

Abstract

We study orthogonal polynomials for a weight function defined over a domain of revolution, where the domain is formed from rotating a two-dimensional region and goes beyond the quadratic domains. Explicit constructions of orthogonal bases are provided for weight functions on a number of domains. Particular attention is paid to the setting when an orthogonal basis can be constructed explicitly in terms of known polynomials of either one or two variables. Several new families of orthogonal polynomials are derived, including a few families that are eigenfunctions of a spectral operator and their reproducing kernels satisfy an addition formula.