2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35960The question is raised whether the unique decomposition of the physical Hilbert space, as emerging in the refined algebraic quantization of a constrained system, may be understood in terms of the old Klein-Gordon type quantization.5 pages, LaTeX (no figures), Talk given at the Eighth Marcel Grossmann meeting, Jerusalem, June 22--27, 1997General Relativity and Quantum Cosmologytext