2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/155229We use a local scale invariance of a classical Hamiltonian and describe how to construct six different formulations of quantum mechanics in spaces with two time-like dimensions. All these six formulations have the same classical limit described by the same Hamiltonian. One of these formulations is used as a basis for a complementation of the usual quantum mechanics when in the presence of gravity.27 pagesHigh Energy Physics - Theorytext