A preview of a page that is going to be published soon.

Coxeter-Dynkin diagram of polytope 2_{41}

The projection of the vertices of polytope 2_{41} to the Coxeter plane is shown in this picture:

A picture of these 2160 points that can be interpreted as deep holes of the honeycomb or as centres of the second layer of nearest neighbours of one sphere, together with 240 centres of the first layer (on 8 circles):