Tridimensional Trivalent Graph
This tridimensional trivalent graph is a lattice where three edges meet at each vertex. Its fundamental mesh (when ) has eight vertices and 12 edges, in a four-unit cubic box. It has the shape of a helicoidal octagonal spiral, with four additional links to the neighbors.
S. Wolfram, A New Kind of Science, Champaign: Wolfram Media, 2002 pp. 477–479.