- #1
ndung200790
- 519
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Please teach me this:
Why 2-point correlation function diagrams have only two external lines.Because of Wick theorem they would have many external legs.
Another thing is whether are there odd number point correlation functions(meaning they are different from 0).
Thank you very much in advanced.
Why 2-point correlation function diagrams have only two external lines.Because of Wick theorem they would have many external legs.
Another thing is whether are there odd number point correlation functions(meaning they are different from 0).
Thank you very much in advanced.