7. [QFTII, 2013] Schwinger-Dyson Equations 1. A σ–π Ward Identity (Amit, 5.11) Derive the following Γππ(p) − Γ σσ(p)
Recursive graphical solution of closed Schwinger–Dyson equations in φ4-theory. (I). Generation of connected and one-particle irreducible Feynman diagrams - ScienceDirect
many body - How to obtain the quasiparticle equation from Dyson equation? - Physics Stack Exchange
Recursive graphical solution of closed Schwinger–Dyson equations in φ4-theory. (I). Generation of connected and one-particle irreducible Feynman diagrams - ScienceDirect