Definition:Graph


 * Graph (Graph Theory) : a set of vertices and edges;


 * Graph of a Mapping : the relation $$\mathcal{R} = \left\{{\left({x, f \left({x}\right)}\right): x \in S}\right\}$$.


 * Logical Graph : A technique for the representation and investigation of statements of propositional logic. It comes in various forms:
 * Conceptual Graph
 * Entitative Graph
 * Existential Graph