Graph theory has the widely ranges of applications and theoretical aspects. In this book, focus in on definitions and there’s an effort to make connections about different types of graphs with using the new ideas which arise from the definitions and using examples which are the tools to get the understandable perspective about the concepts. The context is away from some texts which aren’t in literature of mathematics. The author avoid to bring some texts to describe the ideas and the results before bringing them. The main idea is to write the main concepts but in examples, some explanations are found about the connections of the definitions. In this book, the goal is to present the relations between definition in the ways, the number of def...