2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/173972This paper has been withdrawn by the author; see the much expanded, improved, and generalized version at arXiv:0811.2073.This paper has been withdrawn by the author; see the much expanded, improved, and generalized version at arXiv:0811.2073Representation Theory16D90; 16S35, 17B10text