surjective ==>
surjection
<mathematics> A function f : A -> B is surjective or onto or a surjection
if f A = B. I.e. f can return any value in B. This means that its image is its
codomain.
Only surjections have right inverses, f' : B -> A where f (f' x) = x since if f
were not a surjection there would be elements of B for which f' was not defined.
See also bijection, injection.
(1995-05-27)
Nearby terms:
Sure « surfing « SURGE « surjection »
surjective » surrogate key » suspension
|
