Perturbation theory via Feynman diagrams in classical mechanics

@article{Penco2006PerturbationTV,
  title={Perturbation theory via Feynman diagrams in classical mechanics},
  author={Riccardo Penco and D. Mauro},
  journal={European Journal of Physics},
  year={2006},
  volume={27},
  pages={1241 - 1249}
}
In this paper we show how Feynman diagrams, which are used as a tool to implement perturbation theory in quantum field theory, can be very useful also in classical mechanics, provided we introduce also at the classical level concepts such as path integrals and generating functionals. 
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