2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54808Equivariant cohomology is a mathematical framework particularly well adapted to a kinematical understanding of topological gauge theories of the cohomological type. It also sheds some light on gauge fixing, a necessary field theory operation connected with the non compactness of the gauge group. The respective roles of fields and observables are emphasized throughout.17 pages, LaTeX, also available at http://lapphp0.in2p3.fr/preplapp/psth/ENSLAPP619.ps.gzHigh Energy Physics - Theorytext