2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36242The formal Ermakov approach for empty FRW minisuperspace cosmological models of arbitrary Hartle-Hawking factor ordering and the corresponding squeezing features are briefly discussed as a possible means of describing cosmological evolution3 pages, twocolumn styleGeneral Relativity and Quantum Cosmologytext