Определение surjective в Английский Язык Английский Язык словарь
In mathematics, a function f is said to be surjective if its values span its whole codomain; that is, for every y in the codomain, there is at least one x in the domain such that f(x) = y
{s} onto, serving to map one set in a way that each element is the image of at least one element in a second set (Mathematics)