2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54114The antifield-BRST formalism and the various cohomologies associated with it are surveyed and illustrated in the context of Yang-Mills gauge theory. In particular, the central role played by the Koszul-Tate resolution and its relation to the characteristic cohomology are stressed.20 pages in LaTeXHigh Energy Physics - Theorytext