2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56229We discuss the moduli space of flat connections of Yang-Mills theories formulated on T^3 x R, with periodic boundary conditions. When the gauge group is SO(N>=7), G_2, F_4, E_6, E_7 or E_8, the moduli space consists of more than one component.4 pages, LaTeX, 1 figure, uses cargese.cls, contribution to proceedings of NATO-ASI and TMR Summer School "Progress in String Theory and M-theory", Cargese, May 24 - June 5 1999 (talk by author)High Energy Physics - Theorytext