Image 13 October 201613 October 2016 fgmarcelis New page e8 Look at the page about the Witting honeycomb, e8 par. 9, to see what this means.
Image 12 June 201612 June 2016 fgmarcelis PG(3,2) and E8 Projection of 240 vertices of the regular polytope representing the 240 root vectors of E8 in the Coxeter plane Smallest projective space with 15 points and 15 planes and 35 lines