single-valued function
nounUK /ˌsɪŋɡəl ˈvæljuːd ˈfʌŋkʃən/
US /ˌsɪŋɡəl ˈvæljuːd ˈfʌŋkʃən/
A rule that gives exactly one answer for each input.
The rule that turns each number into its square is a single-valued function.
OTHER MEANINGS
2. A mathematical relation in which no input is paired with more than one output.
In a single-valued function, the graph passes the vertical line test.
3. A mapping that assigns a unique result to every element of its domain.
Addition is a single-valued function of two numbers.
4. A rule in computing that always produces the same output for the same input.
The hash lookup behaves like a single-valued function.