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Geometric Origin of Montonen-Olive Duality

Cumrun Vafa

hep-tharXiv:hep-th/9707131

Abstract

We show how N=4, D=4 duality of Montonen and Olive can be derived for all gauge groups using geometric engineering in the context of type II strings, where it reduces to T-duality. The derivation for the non-simply laced cases involves the use of some well known facts about orbifold conformal theories.

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