I somehow am messed up while reading the conditions that define equivalence relation..by symmetry property x~y implies y~x and by transitivity x~y , y~x implies x~x..so why do we need reflexivity ?

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- April 8th 2012, 06:32 AMclerknecessity of reflexivity in equivalence relation
I somehow am messed up while reading the conditions that define equivalence relation..by symmetry property x~y implies y~x and by transitivity x~y , y~x implies x~x..so why do we need reflexivity ?

- April 8th 2012, 06:44 AMPlatoRe: necessity of reflexivity in equivalence relation
- April 8th 2012, 10:42 PMclerkRe: necessity of reflexivity in equivalence relation
thanks.