2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50976We investigate field theories on the non-commutative torus upon varying theta, the parameter of non-commutativity. We argue that one should think of Morita equivalence as a symmetry of algebras describing the same space rather than of theories living on different spaces (as is T-duality). Then we give arguments why physical observables depend on theta non-continuously.High Energy Physics - Theorytext