Onto | Surjective (English)
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Definition (keystage 3)
A mapping from set A onto B is called surjective (or 'onto') if every member of B is the image of at least one member of A.
Definition (undergraduate level)
A mapping f : A → B is surjective if it satisfies ∀b ∈ B( ∃a ∈ A(f(a)=b)) .
Compare bijective, injective.
Compare bijective, injective.
Relations
- broader:
- (en) Property of function or process
- narrower:
- (en) Bijective
- referenced:
- (en) Surjection
- see also:
- (en) Injective
- (en) One to one
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