Daily Almanac for
Nov 30, 2009
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count'ably ad'ditive func'tion



Math.
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. Cf. finitely additive function.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

countablecountably compact set
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