Jaén, XavierJáuregui, R.Llosa, JosepMolina, Alfred2010-05-062010-05-0619870556-2821https://hdl.handle.net/2445/12323A presymplectic structure for path-dependent Lagrangian systems is set up such that, when applied to ordinary Lagrangians, it yields the familiar Legendre transformation. It is then applied to derive a Hamiltonian formalism and the conserved quantities for those predictive invariant systems whose solutions also satisfy a Fokker-type action principle.14 p.application/pdfeng(c) The American Physical Society, 1987Teoria de camps (Física)Sistemes hamiltoniansMecànica relativistaField theory (Physics)Hamiltonian systemsRelativistic mechanicsinfo:eu-repo/semantics/article33558info:eu-repo/semantics/openAccess