2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/153767Invariants of nonlinear gauge transformations of a family of nonlinear Schrödinger equations proposed by Doebner and Goldin are used to characterize the behaviour of exact solutions of these equations.12 pages, LaTeX, to appear in "Nonlinear, Deformed and Irreversible Quantum Systems", Proceedings of an International Symposium on Mathematical Physics, World Scientific, Singapore 1995Quantum PhysicsHigh Energy Physics - TheoryExactly Solvable and Integrable Systemstext