2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45753The paper contains the real-time perturbation theory for description of a statistical system with the nonuniform temperature distribution. the formalism based on the Wigner-functions approach. The perturbation theory is formulated in terms of the local-temperature Green functions.11 pages, LaTex, no figuresHigh Energy Physics - Phenomenologytext