1. Vertex functionIn quantum electrodynamics, the vertex function describes the coupling between a photon and an electron beyond the leading order of perturbation theory. In particular, it is the one particle irreducible correlation function involving the fermion, the antifermion, and the vector potential A.
Read “Vertex function” on English Wikipedia
Read “頂点関数” on Japanese Wikipedia
Read “Vertex function” on DBpedia
Read “Vertex function” on English Wikipedia
Read “頂点関数” on Japanese Wikipedia
Read “Vertex function” on DBpedia
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