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8. Modes of Existence / A. Relations / 4. Formal Relations / b. Equivalence relation

18465	An 'equivalence' relation is one which is reflexive, symmetric and transitive [Kunen]
	Full Idea: R is an equivalence relation on A iff R is reflexive, symmetric and transitive on A.
	From: Kenneth Kunen (The Foundations of Mathematics (2nd ed) [2012], I.7.1)