2007-12-12 11:25 Mathsci 614×599× (29058 bytes) Bipartite Heawood graph modified from image on en.wikipedia.org with larger yellow and red dots for vertices http://en.wikipedia.org/wiki/Image:Heawood_graph.svg
2007-12-12 11:16 Mathsci 614×599× (27953 bytes) This is a modified version of the Heawood_graph on en.wikipedia with alternate vertices coloured yellow to make the graph bipartite: http://en.wikipedia.org/wiki/Image:614px-Heawood_graph.svg.png