2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74538Generalized solutions of the Cauchy problem for the one-dimensional periodic nonlinear Schrödinger equation, with certain nonlinearities, are not unique. For any $s<0$ there exist nonzero generalized solutions varying continuously in the Sobolev space $H^s$, with identically vanishing initial data.13 pagesAnalysis of PDEs35Q55text