2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/116814Peter Bergmann was a co-inventor of the algorithm for converting singular Lagrangian models into a constrained Hamiltonian dynamical formalism. This talk focuses on the work of Bergmann and his collaborators in the period from 1949 to 1951.13 pages, contribution to proceedings of the Seventh International Conference on the History of General Relativity, March 10 - 14, 2005, Tenerife, SpainHistory and Philosophy of PhysicsGeneral Relativity and Quantum Cosmologytext