Convey symmetric difference of two sets?
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The symmetric difference of two sets A and B is the set (A – B) ∪ (B – A) and is denoted by A △ B. ... A △ B is the set of all those elements which belongs either to A or to B but not to both. A △ B is also expressed by (A ∪ B) - (B ∩ A).
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The symmetric difference can also be expressed as the union of the two sets, minus their intersection: Thus, the power set of any set X becomes an abelian group under the symmetric difference operation. (More generally, any field of sets forms a group with the symmetric difference as operation.)
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