Chapter 9

Graph Theory

Learning Objectives

On completing this chapter, you should be able to:

  • define the notions of a graph, directed graph and a simple graph

  • define and calculate the degree of a vertex in a graph

  • define the concept of a connected graph

  • define the notions of walks and paths connecting two vertices of a given graph

  • identify connected graphs

  • identify the connected components of a graph, which is not connected

  • define the notion of bipartite graphs

  • define the notion of a tree

  • prove simple results on connected graphs

  • prove simple results on trees

  • define the notion of an Euler graph

  • prove the characterization of an Euler graph


Example 9.1

Graphs can be used to show the inter-connectivity among ...

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