2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39256We show that in the spin-network basis it is possible to compute the matrix elements of any given operator of the Hamiltonian formulation of Lattice Gauge Theory (LGT). We give the explicit calculation for the case of the plaquette operator.5 pages, Latex. Talk presented at: XVII Autumn school "QCD: perturbative or non-perturbative?" Istituto Superior Tecnico, Lisboa, 29/9-4/10/1999High Energy Physics - Latticetext