indicator function (Q371983)
function that returns 1 if an element is present in a specified subset and 0 if absent; naturally isomorphic with a set's subsets
Language:
Current Data About indicator function
(P279) (Q11348)
(P2534) \mathbf{1}_A(x) := \begin{cases} 1 ~&\text{ if }~ x \in A~, \\ 0 ~&\text{ if }~ x \notin A~. \end{cases}
(P2579) (Q114704935)
(P6104) (Q8487137)
(P7235) \mathbf{1}_A
A
other details
aliases characteristic function
description function that returns 1 if an element is present in a specified subset and 0 if absent; naturally isomorphic with a set's subsets

External Links