2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56286Generators for the discrete U-duality groups of toroidally compactified M-theory in d>3 are presented and used to determine the d=3 U-duality group. This contribution summarizes the results of hep-th/9909150.4 pages, uses cargese.cls (included). To appear in the gong show section of the proceedings of the Cargese'99 summer school "Progress in String Theory and M-theory", May 24 - June 5High Energy Physics - Theorytext