Grifone, JosephMuñoz Masqué, JaimePozo Coronado, Luis MiguelKozma, LászlóNagy, Péter T.Tamássy, L.2023-06-202023-06-202001https://hdl.handle.net/20.500.14352/60703The systems of first-order quasilinear partial differential equations defined on the 1-jet bundle of a fibred manifold which come from a variational problem defined by an affine Lagrangian are characterized by means of the Hamilton-Cartan formalism and the theory of formal integrability.engbook parthttp://www.emis.ams.org/proceedings/CDGD2000/pdf/K_Grifone.pdfhttp://www.emis.ams.orgopen access517.9Characteristic classesConnections on a principal bundleGgauge invarianceInfinitesimal symmetriesJet bundlesLagrangiansLie algebra representationsWeil polynomials.Ecuaciones diferenciales1202.07 Ecuaciones en Diferencias