2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/186918Barbero recently suggested a modification of Ashtekar's choice of canonical variables for general relativity. Although leading to a more complicated Hamiltonian constraint this modified version, in which the configuration variable still is a connection, has the advantage of being real. In this article we derive Barbero's Hamiltonian formulation from an action, which can be considered as a generalization of the ordinary Hilbert-Palatini action.6 pagesGeneral Relativity and Quantum Cosmologytext