TY - JOUR AU - Muñoz Masqué, Jaime AU - Pozo Coronado, Luis Miguel PY - 1998 DO - 10.1088/0305-4470/31/29/014 SN - 0305-4470 UR - https://hdl.handle.net/20.500.14352/57772 T2 - Journal of physics A: Mathematical and general AB - A projection is defined such that a second-order Lagrangian density factors through this projection module contact forms if and only if it is parameter invariant. In this way, a geometric interpretation of the parameter invariance conditions is... LA - eng M2 - 6225 PB - Iop science KW - Second-order Lagrangian density KW - Parameter invariance KW - Poincare-Cartan form KW - Squared curvature Lagrangian TI - Parameter-invariant second-order variational problems in one variable TY - journal article VL - 31 ER -