Abstract
The invariant volume element in the SU(N) group (the Haar measure). The Faddeev–Popov–DeWitt determinant for a given gauge condition. The Faddeev–Popov ghost fields. The correct path integral representation of the Green’s functions of local gauge-invariant operators. Feynman diagrams for the pure non-Abelian gauge field theory. The essential role of the gauge fixing term in the classical effective action. BRST invariance of the effective action and of the measure in the path integral. The Slavnov–Taylor identity for the generating functional of Green’s functions.
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