2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/100574The total spin of the ground state is calculated in the U -> infinity Hubbard model with uniform magnetic flux perpendicular to a square lattice, in the absence of Zeeman coupling. It is found that the saturated ferromagnetism emerges in a rather wide region in the space of the flux density ϕand the electron density n_e. In particular, the saturated ferromagnetism at ϕ= n_e is induced by the formation of a spin-1/2 boson, which is a composite of an electron and the unit flux quantum.4 pages, 3 figures; final versionStrongly Correlated Electronstext