The universe relative (Relative Universe.)The universe is the set that defines the relative scope of what you want to study, which is considered the largest set, with an agreement that will say to the members of the set. There is no mention of anything other than the members of this set. In General, use the symbol U, rather than the relative universe.For example, a given U = {1, 2, 3, 4, 5, 6, 7, 8}.A = {1,3,5,7}B = {2,4,8}Or I + ε U = {x |A = {x | x ε U = n + 3, n is odd when you remember the full positive notwon}B = {x | x ε U = n + 3, n is required in full when you double plus notwon}That is, both A and B is the set of choppers U.
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