Definition:Graph


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


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


 * Mapping Theory
 * Graph of a Mapping: the relation $\mathcal R = \set {\tuple {x, \map f x}: x \in S}$
 * Graph of a Real Function: the subset of $\R^n \times \R^k$: $\map \Gamma f = \set {\tuple {x, y} \in \R^n \times \R^k: x \in U \subseteq \R^n : \map f x = y}$


 * Relation Theory
 * Graph of a Relation: the truth set of a relation $\mathcal R$ on $S \times T$:
 * $\map {\mathcal T} {\mathcal R} = \set {\tuple {s, t}: s \mathrel {\mathcal R} t}$


 * Statistics
 * Graph: a general and loosely-defined word to mean any sort of graphical presentation of a set of data.