2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152850This is an extended abstract of a lecture held at the Conference ``Fourier and Radon transformations on symmetric spaces'' in honor of Professor S. Helgason's 65th birthday, Roskilde, Denmark, Sept. 10--12, 1992.Classical Analysis and ODEsJacobi polynomials of type BC, Jack polynomials, limit transitions and O(\infty)text