Feynman Rules II: QEDExplores Feynman rules in QED, emphasizing normal ordered product and Wick's theorem, instantons, and relativistic amplitudes.
Euclidean Path IntegralsExplores Euclidean path integrals in Quantum Field Theory and Perturbation Theory using Feynman diagrams.
Proof of Weyl's TheoremExplores the proof of Weyl's theorem, focusing on discrete spectrum, ground states, and potential energy continuity.