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indicator function
Function that returns 1 if an element is present in a specified subset and 0 if absent; naturally isomorphic with a set's subsets
EntityQ371983
Also known as characteristic function
- Subclass of
Overview
All data
11 statements · 9% with external sources · numbers in brackets are citations
- Defining formula
\mathbf{1}_A(x) := \begin{cases} 1 ~&\text{ if }~ x \in A~, \\ 0 ~&\text{ if }~ x \notin A~. \end{cases}
- In defining formula
\mathbf{1}_Asymbol represents: indicator functionAsymbol represents: subset
On other databases
6 identifiers linking indicator function across the web's reference databases