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Is the union of two equivalence relations always an equivalence relation?

Answer and explanation

Correct answer: no, transitivity may fail

Step 1: The union of two equivalence relations may remain reflexive and symmetric. Step 2: But one pair may come from one relation and the next pair from the other, so the required third pair may be missing. Step 3: Therefore the union is not always an equivalence relation.

Related tags

RelationsUnionEquivalenceTransitivityIntroduction To RelationsRelations And FunctionsMathematicsClass 12 Mcq

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