2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152742This is an introductory survey of the theory of $p$-form conservation laws in field theory. It is based upon a series of lectures given at the Second Mexican School on Gravitation and Mathematical Physics held in Tlaxcala, Mexico from December 1--7, 1996. Proceedings available online at http://kaluza.physik.uni-konstanz.de/2MS/ProcMain.html.plain TeX, 38 pagesHigh Energy Physics - TheoryGeneral Relativity and Quantum CosmologyMathematical PhysicsLocal cohomology in field theory (with applications to the Einstein equations)text