Light-cone superspace BPS theory

The BPS bound is formulated in light-cone superspace for the N=4 super-Yang-Mills theory. As a consequence of the superalgebra all momenta are shown to be expressed as a quadratic form in the relevant supertransformations, and these forms are used to derive the light-cone superspace BPS equations. Finally, the superfield expressions are expanded out to component form, and the Wu-Yang monopole boosted to the infinite momentum frame is shown to be a solution.