In mathematics, a binary relation \(R\) on a set \(X\) is reflexive if it relates every element of \(X\) to itself [(\(x R x \;\forall\; x \in X\))].
An example of a reflexive relation is the relation “is equal to” on the set of real numbers, since every real number is equal to itself.
Bibliography
“Reflexive Relation.” 2022. Wikipedia, July. https://en.wikipedia.org/w/index.php?title=Reflexive_relation&oldid=1098438388.