Definition:Reflexive Relation

Definition
Let $\RR \subseteq S \times S$ be a relation in $S$.

Also see

 * Equivalence of Definitions of Reflexive Relation


 * Definition:Reflexivity


 * Definition:Coreflexive Relation
 * Definition:Antireflexive Relation
 * Definition:Non-Reflexive Relation


 * Definition:Symmetric Relation
 * Definition:Transitive Relation