Define an equivalence relation.

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A relation R on set A is said to be an equivalence relation iff
(i) it is reflexive,
(ii) it is symmetric and
(iii) it is transitive.

Relation R on set A satisfying all the above three properties is an equivalence relation.

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Define an equivalence relation.

A relation R on set A is said to be an equivalence relation iff (i) it is reflexive, (ii) it is symmetric and (iii) it is transitive. Relation R on set A satisfying all the above three properties is an equivalence relation.

A relation R on set A is said to be an equivalence relation iff
(i) it is reflexive,
(ii) it is symmetric and
(iii) it is transitive.

Relation R on set A satisfying all the above three properties is an equivalence relation.