Indicator function
id:
indicator-function-291-8030843
title:
Indicator function
text:
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 to zero. That is, if A is a subset of some set X, then 1 A = 1 if x ∈ A , and 1 A = 0 otherwise, where 1 A is a common notation for the indicator function. Other common notations are I A , and χ A . The indicator function of A is the Iverson bracket of the property of belonging to A; that is, For example, the Dirichlet function is t
brand slug:
wiki
category slug:
encyclopedia
description:
Mathematical function characterizing set membership
original url:
https://en.wikipedia.org/wiki/Indicator_function
date created:
date modified:
2023-11-28T19:54:21Z
main entity:
{"identifier":"Q371983","url":"https://www.wikidata.org/entity/Q371983"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/f/f5/Indicator_function_illustration.png","width":813,"height":516}
fields total:
13
integrity:
15