: Astronomie: Dyson-Schwinger equation

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Dyson-Schwinger equation

The Schwinger–Dyson equations (SDEs) or Dyson–Schwinger equations, named after Julian Schwinger and Freeman Dyson, are general relations between correlation functions in quantum field theories (QFTs). They are also referred to as the Euler–Lagrange equations of quantum field theories, since they are the equations of motion corresponding to the Green's function. They form a set of infinitely many functional differential equations, all coupled to each other, sometimes referred to as the infinite tower of SDEs. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Schwinger%E2%80%93Dyson_equation)

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