2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51664The role of Wigner's little group, as an abelian gauge generator in different contexts, is studied.LaTex, 5 pages; Invited talk at the Wigner Centennial Conference, Pecs, Hungary, July 8- 12, 2002High Energy Physics - Theorytext