2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55534We study the gauge covariance of the fermion-photon vertex in quenched, massless 3-dimensional quantum electrodynamics. A class of vertex Ansätze obtained by generalizing that proposed by Dong et al. is tested using the invariance of the photon polarization scalar under the Landau-Khalatnikov transformation.6 pages, 1 PostScript figure in .eps format, uses epsfig.styHigh Energy Physics - Theorytext