Countably-additive-function
noun, Mathematics.
1.
a set function that upon operating on the union of a countable number of disjoint sets gives the same result as the sum of the functional values of each set.
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noun, Mathematics. 1. a set for which every cover consisting of a countable number of sets has a subcover consisting of a finite number of sets.
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countable
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verb 1. (intransitive, preposition) to have influence to the disadvantage of: your bad timekeeping will count against you Be disadvantageous to, as in His earnings this year will count against his Social Security benefits. This idiom uses count in the sense of “make a reckoning,” in this case negative. [ Early 1900s ]
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