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"A partition of a set X is a set of nonempty subsets of X such that every element x in X is in exactly one of these subsets."
I was just wondering why the subsets must be nonempty. Is it just convention/convenient or is it because it would violate something else?
Thanks!
I was just wondering why the subsets must be nonempty. Is it just convention/convenient or is it because it would violate something else?
Thanks!