Keywords: Maximal three-colorable.png Maximal three-colorable svg Diagram demonstrating two maximal three-colorings of different sizes which shows that three-colorings do not form a matroid The one on the left cannot be enlarged because the only remaining vertex is already adjacent to all three colors Created by Derrick Coetzee in Adobe Illustrator and Photoshop Author's own work Transferred from en wikipedia was en Image Maximal three-colorable png 19 March 2006 Original upload date to commons User Dcoetzee Dcoetzee original upload log wikitable border 1 style width 100 ; margine 0 auto; - Date/Time Dimensions User Comment - 22 34 3 July 2005 300x137 2789 bytes User Deco Talk Fix spacing color the vertices leave numbers for B W printouts - 22 26 3 July 2005 300x138 2457 bytes User Deco Talk Diagram demonstrating two maximal three-colorings of different sizes which shows that three-colorings do not form a en Matroid matroid The one on the left cannot be enlarged because the only remaining vertex is already adjacent to all three colors Created by Graph coloring; vertex |