Graph Theory In this tutorial, We will learn about the basic terms and their definitions that widely used in the field of graph theory. Introduction Graph theory is a branch of mathematics and computer science where we study mathematical structure which used to model the relationship between objects. Here the structure is a graph, objects are nodes or vertex and relation that join any two objects called node. In the given figure Graph : Whole structure (A, B, C, D, E, F) and all lines Node/Vertex : A, B, C, D, E, and F are vertex Edge : The line joining any two vertexes is edge Example: AB, AC, AD, BC, BE, DE, and DF are edge Undirected Graph An undirected graph is a set of objects (called vertices or nodes) that are connected together, where all the edges are bidirectional. Directed Graph A directed graph is a set of objects (called vertices or nodes) that are connected together, where all the edges are directed from one vertex to another. Unw...