2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58189We study geometry of the phase space for finite-dimensional dynamical systems with degenerate Lagrangians. The Lagrangian and Hamiltonian constraint formalisms are treated as different local-coordinate pictures of the same invariant procedure. The invariant description is given in terms of geometrical objects associated with the structure of foliation on the phase space.27 pagesMathematical PhysicsHigh Energy Physics - TheoryDynamical Systems58F06;58F05;81S10text