Definition:Graph


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


 * Graph (Category Theory): the same concept as for graph theory but in the context of categories


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


 * Graph of a Relation: the truth set of a relation $\mathcal R$ on $S \times T$:
 * $\mathcal T \left({\mathcal R}\right) = \left\{ {\left({s, t}\right): s \mathrel {\mathcal R} t}\right\}$