2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56609In the framework of polysymplectic Hamiltonian formalism, degenerate Lagrangian field systems are described as multi-Hamiltonian systems with Lagrangian constraints. The physically relevant case of degenerate quadratic Lagrangians is analized in detail, and the Koszul--Tate resolution of Lagrangian constraints is constructed in an explicit form. The particular case of Hamiltonian mechanics with time-dependent constraints is studied.28 pages, the report on 15th International Workshop on Differential Geometric Methods in Theoretical Mechanics, Tenerife, August 20-27, 2000Mathematical Physicstext