E6

E6    |    pencil, paper, acrylic    |    each sheet 16 1/8 x 12 [ inches ]
In grand unification theories, E6 appears as a possible gauge group which, after its breaking, gives rise to the SU(3) × SU(2) × U(1) gauge group of the standard model. One way of achieving this is through breaking to SO(10) × U(1).    |    wikipedia entry