Non \(3\)-Choosable Bipartite Graphs and The Fano Plane

Shannon L.Fitzpatrick1, Gary MacGillivray2
1University of Prince Edward Island Charlottetown, Prince Edward Island
2University of Victoria Vietoria, British Columbia, Canada V8W 3P4

Abstract

It is known that the smallest complete bipartite graph which is not \(3\)-choosable has \(14\) vertices. We show that the extremal configuration is unique.