2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107210The examples of ten-dimensional vacuum Einstein spaces composed of four-dimensional Einstein spaces and six-dimensional Ricci-flat base space defined by the solutions of the Korteveg de-Vries equation are constructed.9 pagesGeneral Relativity and Quantum CosmologyExactly Solvable and Integrable Systemstext