2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55899We investigate non-Abelian gauge theories within a Wilsonian Renormalisation Group approach. Our main question is: How close can one get to a gauge invariant flow, despite the fact that a Wilsonian coarse-graining seems to be incompatible with gauge invariance? We discuss the possible options in the case of quantum fluctuations, and argue that for thermal fluctuations a fully gauge invariant implementation can be obtained.18 pages, to be published in the proceedings of the Faro workshop on the Exact Renormalisation Group, September 1998High Energy Physics - TheoryHigh Energy Physics - Phenomenologytext