2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/63455We present a friendly introduction to the very detailed results in [9,10,11] and as an illustration we discuss here the issue of {\em linearization of products}. We find some interesting new phenomena.11 pagesRepresentation TheoryClassical Analysis and ODEs22E30; 22E46; 33C45An Invitation to Matrix Valued Spherical Functions: Linearization of Products in the Case of the Complex Projective Space $P_2({\mathbb C})$text