In mathematics, an indicator function or a characteristic function is a function defined on a set that indicates membership of an element in a subset of, having the value 1 for all elements of A and the value 0 for all elements of X not in A.
Read more about Indicator Function: Definition, Remark On Notation and Terminology, Basic Properties, Mean, Variance and Covariance, Characteristic Function in Recursion Theory, Gödel's and Kleene's representing Function, Characteristic Function in Fuzzy Set Theory
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“The uses of travel are occasional, and short; but the best fruit it finds, when it finds it, is conversation; and this is a main function of life.”
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