2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56451The relevance of the BRST cohomology of the extended antifield formalism is briefly discussed along with standard homological tools needed for its computation.10 pages Latex file, Proceedings of the spring school "Q.F.T., Supersymmetry and Superstrings" in Calimanesti, Romania, April 1998High Energy Physics - Theorytext