2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53550The properties of the canonical symmetry of the nonlinear Schrödinger equation are investigated. The densities of the local conservation laws for this system are shown to change under the action of the canonical symmetry by total space derivatives.10 pages, LaTeX file, IHEP 93-26High Energy Physics - Theorytext