2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/206691Numerous examples are given of application of Bogolubov's forest formula to iterative solutions of various non-linear equations: one and the same formula describes everything, from ordinary quadratic equation to renormalization in quantum field theory.LaTex, 21 pagesHigh Energy Physics - Theorytext