2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/209325Based on the notion of time translation, we develop a formalism to deal with the logic of quantum properties at different times. In our formalism it is possible to enlarge the usual notion of context to include composed properties involving properties at different times. We compare our results with the theory of consistent histories.17 pagesQuantum Physicstext