2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185107The lower bound masses of the ground-state relativistic three-boson system in 1+1, 2+1 and 3+1 space-time dimensions are obtained. We have considered a reduction of the ladder Bethe-Salpeter equation to the light-front in a model with renormalized two-body contact interaction. The lower bounds are deduced with the constraint of reality of the two-boson subsystem mass. It is verified that, in some cases, the lower bound approaches the ground state binding energy. The corresponding non-relativistic limits are also verified.14 pages, 4 ps-figures. To appear in J. of Phys. GHigh Energy Physics - Phenomenologytext