About: Indicator function

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In mathematics, an indicator function or a characteristic function of a subset of a set is a function that maps elements of the subset to one, and all other elements of the set to zero. The indicator function of a subsetA of a set X maps X to the two-element set if an element in X belongs to A, and if does not belong to A. It may be denoted as by or by The Dirichlet function, the indicator function of the rational numbers as a subset of the real numbers, is an example of an indicator function.

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rdf:type	disease
rdfs:label	Indicator function (en)
rdfs:comment	In mathematics, an indicator function or a characteristic function of a subset of a set is a function that maps elements of the subset to one, and all other elements of the set to zero. The indicator function of a subsetA of a set X maps X to the two-element set if an element in X belongs to A, and if does not belong to A. It may be denoted as by or by The Dirichlet function, the indicator function of the rational numbers as a subset of the real numbers, is an example of an indicator function. (en)
sameAs	Indicator function Indicator function
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Subject	Basic concepts in set theory Probability theory Real analysis Types of functions Integral calculus Mathematical logic Measure theory
gold:hypernym	Function
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/Indicator_function?oldid=1070840890&ns=0
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