2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29874The macroscopic zero-temperature behavior of weakly- incommensurate systems in one dimension is described in terms of solitons. The soliton density n obeys equations displaying several types of singular interface-like solutions: (i) equilibrium or moving boundary between the n = 0 and finite n regions, and (ii) stationary or moving annihilation front separating solitons from antisolitons.4 pages, 1 figureStatistical Mechanicstext