%0 Journal Article %T Exact Electromagnetic Duality %A David I Olive %J Physics %D 1995 %I arXiv %R 10.1016/0920-5632(95)00618-4 %X This talk, given at several conferences and meetings, explains the background leading to the formulation of the exact electromagnetic duality conjecture believed to be valid in N=4 supersymmetric SU(2) gauge theory. %U http://arxiv.org/abs/hep-th/9508089v1