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Michele Cirafici, CAMGSD/IST

Hypermultiplets and Calabi-Yau Compactifications

I will discuss a general formalism to compute non-perturbative corrections to the low energy effective action in Calabi-Yau compactifications with $N=2$ supersymmetry. I will describe how a detailed analyis of the instanton effects can support some recent conjectures on the quantum structure of the hypermultiplet moduli space.