Surjection

Pronunciation

• IPA: /sɜː(r).dÊ’É›k.ʃən/

Origin

From French surjection, introduced by Nicolas Bourbaki in his treatise Éléments de mathématique.

Full definition of surjection

Noun

1. (mathematics) 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.

Related terms

• injection
• bijection