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These notes accompany an introductory lecture course on the twistor approachto supersymmetric gauge theories aimed at early-stage PhD students. It was heldby the author at the University of Cambridge during the Michaelmas term in2009. The lectures assume a working knowledge of differential geometry andquantum field theory. No prior knowledge of twistor theory is required.

A First Course on Twistors, Integrability and Gluon Scattering Amplitudes