The Pregolya River passes through a city once known as Königsberg. In the 1700s seven bridges were situated across this river in a manner similar to what you see in Figure 1.1. The city’s residents enjoyed strolling on these bridges, but, as hard as they tried, no resident of the city was ever able to walk a route that crossed each of these bridges exactly once.
KeywordsSpan Tree Bipartite Graph Planar Graph Chromatic Number Petersen Graph
Unable to display preview. Download preview PDF.