Symmetric distinction of sets An and B, indicated A A B or A e B, is the arrangement of all protests that are an individual from precisely one of An and B {components which are in one of the sets, vet all at once not in both}. For example, for the sets {1, 2, 3} and {2, 3, 4}, the symmetric distinction set is {1, 4}. It is the set distinction of the association and the crossing point, (A U B) \\ [A n B} or {A\\ B} u [B \\A}, Cartesian result of An and B, indicated Ax B, is the set whose individuals are for the most part conceivable arranged sets (a, b}, where a will be an individual from An and b is an individual from B. For instance, the Cartesian result of {1, 2} and {red, white} is {(1, red), [1, white}, [2, red}, {2, whitel}