2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104728The Cauchy problem for a coupled Schroedinger and Benjamin - Ono system is shown to be globally well-posed for a class of data without finite energy. The proof uses the I-method introduced by Colliander, Keel, Staffilani, Takaoka, and Tao.17 pagesAnalysis of PDEs35Q55; 35Q35text