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characteristic function

noun, Mathematics
1.
a function defined on a given set, having value 1 for every element of the set and value 0 for every element not contained in the set.
Origin
1875-1880
1875-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for characteristic-function

characteristic function

noun
1.
(maths) a function that assigns the value 1 to the members of a given set and the value 0 to its nonmembers
2.
(statistics) a function derived from the probability distribution function that enables the distribution of the sum of given random variables to be analysed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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