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in type IIA theory it is possible to compute correlation functions by infinite sums over instanton areas [tex]\sum e^{-Area}[/tex]. Wouldn't that mean that it is possible to get two-point correlators? Imagine a torus with one brane on each of the two lattice vectors. They bound a parallelogram which is identical to the torus covering space. Is there anything that prevents us from summing up these areas to a valid correlator coming from just two branes?

Thank you,

hines

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# Instantons in type IIA theory and correlators

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