2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93436It is shown that, in order to avoid unacceptable nonlocal effects, the free parameters of the general Doebner-Goldin equation have to be chosen such that this nonlinear Schrödinger equation becomes Galilean covariant.10 pages, no figures, also available on http://www.pt.tu-clausthal.de/preprints/asi-tpa/012-97.htmlQuantum Physicstext