Sets

Let A and B be two subsets of a universal set U.

Union of two sets

AÈB = {x / x Î A or x Î B }

Intersection of two sets

AÇB = {x / x Î A and x Î B }

Difference of two sets

A-B = {x / x Î A and x Ï B }

Complement of a set

= U - A = {x / x Î U and x Ï A }

Symmetric difference of two sets

= (A-B) È (B-A)

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