2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40805If tan beta is large, supersymmetric QCD corrections can become large, putting naive perturbation theory into doubt. I show how these tan-beta-enhanced corrections can be controlled to all orders in alpha_s tanbeta. The result is shown for the decays H^+ -> t b-bar and b -> s gamma.preprint no. added, typos corrected, talk at Moriond 2001High Energy Physics - Phenomenologytext