2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54225We present a simple argument determining the shape of the curves of marginal stability in the N=2 supersymmetric SU(2) QCD with less than 4 massless flavors. The argument relies only on the modular properties of $a_D/a$ and its weak-coupling behavior.Plain TeX, 2 pages, 1 uuencoded figure included using epsfHigh Energy Physics - Theorytext