2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/129681A formally exact relation is derived which connects thermodynamically non-equilibrium evolution of gas density distribution after its arbitrary strong spatially non-uniform perturbation and evolution of many-particle correlations between path of some marked particle and its surroundings in equilibrium gas. This relation directly confirms significance of the many-particle correlations even under the Boltzmann-Grad limit and thus validates the earlier suggested revision of kinetics.8 pages, no figures, RevTex4Statistical MechanicsSoft Condensed Mattertext