2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47171This contribution reviews the latest results of the perturbative calculations of heavy-Higgs two-loop amplitudes. A comparison of perturbative results with nonperturbative lattice calculations is made, and the theoretical uncertainties of the lower and upper bound on the Standard Model Higgs mass are presented.9 pages; to appear in the proceedings of the Ringberg Workshop on ``The Higgs Puzzle --- What Can We Learn from LEP2, LHC, NLC and FMC?'', Munich, Germany, 8-13 December 1996High Energy Physics - Phenomenologytext