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Mar 26, 2016 at 14:53 comment added giulio bullsaver I think the OP question is whether Feynmann diagrams may be used to represent any perturbation theory, not just perturbation theory in Quantum Field Theory or Statistical Mechanics.
Mar 7, 2016 at 19:48 history edited Benjamin CC BY-SA 3.0
To back up my argument, I included a citation from two experts in the field along with a more elaboration on the physical interpretation of the Feynman diagrams.
Mar 7, 2016 at 2:16 history answered Benjamin CC BY-SA 3.0