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A strong coupling test of S-duality

Cumrun Vafa, Edward Witten
1994 Nuclear Physics B  
By studying the partition function of $N=4$ topologically twisted supersymmetric Yang-Mills on four-manifolds, we make an exact strong coupling test of the Montonen-Olive strong-weak duality conjecture. Unexpected and exciting links are found with two-dimensional rational conformal field theory.
doi:10.1016/0550-3213(94)90097-3 fatcat:iv74ztp6gbcgxeq4zlvvcxupvi