2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/94563Small perturbation of the Liouville equation under singular initial data is considered. An asymptotics of the singular solution is constructed by the method which is similar to Bogolubov -- Krylov one. The main object is an asymptotics of the singular lines.5 pagesExactly Solvable and Integrable Systemstext