Mathematical Quantum Field Theory - Free Quantum Fields - Comments

[Urs Schreiber]

Greg Bernhardt submitted a new PF Insights post

Mathematical Quantum Field Theory - Free Quantum Fields

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[Urs Schreiber]

The Schwinger-Dyson equation at this point (prop. 14.27) may look innocent, but in chapter 16 we will see that it is already the free archetype of the important condition known as the "quantum master equation" or "master Ward identity" which controls the absence of quantum anomalies in renormalization of gauge theories.