Keywords: Crown graph 12.svg crown graph In this bipartite graph each vertex is adjacent to five out of the six vertices of the opposite color It is the intersection graph of the lines of the Schläfli double six configuration 2013-07-28 11 27 21 own David Eppstein cc-zero Uploaded with UploadWizard Files by User David Eppstein from en 6-fold rotational symmetry Blue and yellow Round Crown graph 6 |