2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36334After a review of the canonical reduction to the rest-frame Wigner-covariant instant form of standard theories in Minkowski spacetime, a new formulation of tetrad gravity is introduced. Its canonical reduction, also in presence of N scalar particles, is done. The modification of the ADM formulation to solve the deparametrization problem of general relativity (how to recover the rest-frame instant form for G=0), is presented.25 pages, latex; corrected versionGeneral Relativity and Quantum Cosmologytext