Relation
# Definition 1
A Relation $R$ is a Set of Tuples
# Definition
Let $X$ be a Set. A Relation $R$ on $X$ is a subset of $X \times X$. If $(x, y) \in R$, then we write $xRy$.
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A Relation $R$ is a Set of Tuples
Let $X$ be a Set. A Relation $R$ on $X$ is a subset of $X \times X$. If $(x, y) \in R$, then we write $xRy$.