2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50106We show that the class of functions of topologically nontrivial gauge transformations in QCD includes a zero-mode of the Gauss law constraint. The equivalent unconstrained system compatible with Feynman's integral is derived in terms of topological invariant variables, where the zero-mode is identified with the winding number collective variable and leads to the dominance of the Wu-Yang monopole. Physical consequences of Feynman's path integral in terms of the topological invariant variables are studied.12 pages, no figuresHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext