My Math Forum Equivalence relation

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 April 20th, 2010, 10:01 AM #1 Newbie   Joined: Mar 2010 Posts: 18 Thanks: 0 Equivalence relation I just would like to know whether I understood this correctly Given the relation R = {(1, 1), (2, 3), (3, 2)} in A = {1, 2, 3}, i.e. R ? A × A. Is R an Equivalence relation? My attempts at a solution: From the relationship R we can see that there is no reflexivity. And since reflectivity is required to have an equivalence relation, the answer is no? Thanks in advance!
 April 20th, 2010, 11:52 AM #2 Senior Member   Joined: Oct 2007 From: Chicago Posts: 1,701 Thanks: 3 Re: Equivalence relation Yup. That's correct.

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