2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58400The dromion of the Davey-Stewartson-1 equation is studied under perturbation on the large time.Mistake and misprints are corrected. Latex, 14 pagesMathematical PhysicsPattern Formation and SolitonsExactly Solvable and Integrable Systemstext