 use this approach to prove Diaconescu, Moore, and Witten's conjectured constraint on the 3-fluxes, and they show that there is an additional term equal to the D3-brane charge.shows that the Klebanov-Strassler cascade of Seiberg dualities consists of a series of S-dual MMS instantons, one for each Seiberg duality.The group, formula_1 of universality classes of the formula_6 supersymmetric gauge theory is then shown to agree with the S-dual twisted K-theory and not with the original twisted K-theory.