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MULTI-INSTANTON CORRECTIONS TO SUPERPOTENTIALS IN TYPE II COMPACTIFICATIONS
We consider two simple examples of multi-instanton configurations in type II four-dimensional superstring compactifications. The first one involves O(1) and U(1) D2-instantons embedded in [Formula: see text] geometry with SU(4) gauge symmetry coming from D6-branes and the second is related to the quiver gauge theory of orientifolded orbifold of conifold …