2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50593We evaluated some particular type of functional integral over the local gauge group C^{\infty}({\bf R}^n, U(1)) by going to a discretized lattice. The results explicitly violates the property of the Haar measure. We also analysed the Faddeev-Popov method through a toy example. The results also violates the property of the Haar measure.7 pages, RevtexHigh Energy Physics - Theorytext