2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27499In this work, we study some general property of a strongly correlated electron system defined on a lattice. Assuming that the lattice system exhibits off-diagonal long range order, we show rigorously that this assumption would lead to Meissner effect. This generalizes previous results of continuous case to a lattice electron system.7 pages, LatexCondensed Mattertext