2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185493We discuss the covariant formulation of local field theories described by the Companion Lagrangian associated with p-branes. The covariantisation is shown to be useful for clarifying the geometrical meaning of the field equations and also their relation to the Hamilton-Jacobi formulation of the standard Dirac-Born-Infeld theory.12 pages, LatexHigh Energy Physics - Theorytext