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Equivalence RelationI have come across a question as "The number of equivalence relations that can be defined on a set with two elements is " and same question for 3 elements as well. Since I have the answers with me I am thinking the possible general term would be $\displaystyle 2^n - n$ Someone correct meí ½í¸Š |

In general, it's not $2^n - n$. |

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