2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/220791We construct a Quillen model structure on the category of spectral categories, where the weak equivalences are the symmetric spectra analogue of the notion of equivalence of categories.19 pagesK-Theory and HomologyAlgebraic Topology18D20, 55P43, 18G55, 19D55text