2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16712We derive the equations of hydrodynamics of a fully polarized electron gas placed in a strong magnetic field. These equations reveal the existence of solitons - immobile or propagating domain wall-like defects whose plane is perpendicular to the field direction. The solitons are used to construct weakly excited states, and novel nonuniform persistent current states of the system.4 paqes, 3 figuresCondensed MatterAstrophysicstext