2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/66871We give a simple proof of a Theorem of Cline, Parshall and Scott about the category O of BGG and suggest an analog for Harish-Chandra modules.6 pages, LaTeX. Related material is available at http://www.iecn.u-nancy.fr/~gaillardRepresentation Theorytext