2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207076Reduction to physical degrees of freedom before quantization leads to predictions for one-loop amplitudes in quantum cosmology in the presence of boundaries which disagree with the results obtained from Faddeev-Popov theory and boundary-counterterms technique. However, the mode-by-mode analysis of eigenvalue equations for gauge modes and ghost fields remains a very difficult problem. Hence the equivalence or inequivalence of various quantization and regularization techniques cannot be easily proved.5 pages, plain-tex, published in Nuovo Cimento B, volume 109, pages 203-205, year 1994General Relativity and Quantum Cosmologytext