Definition from Wiktionary, the free dictionary
surjection (plural surjections)
- (set theory) A function of "many-to-one" mapping relationship; more formally, f: X → Y is a surjection if and only if, for every y in the codomain Y, there is at least one x in the domain X with f(x) = y.
function of "many-to-one" mapping relationship
surjection f (plural surjections)