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We consider a simple quiver gauge theory with gauge group U(r1)×U(r2) and a Higgs field in the bi-fundamental representation. The background for this theory is a compact Kähler manifold M. For a careful but natural choice of Higgs field potential the second order field equations can be replaced with a set of first order BPS equations. We show that the theory admits two energy gaps: The vacuum is topologically...
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