2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/141424We attract attention to an interesting family of quantum systems where the generator $H_{(gen)}$ of time-evolution of wave functions is not equal to the Hamiltonian $H$. We describe the origin of the difference $H_{(gen)}-H$ and interpret it as a carrier of a compressed information about the other relevant observables.7 ppQuantum Physicstext