surjection

[数]满射

发音

其它 /sɜː(ɹ)ˈd͡ʒɛk.ʃən/
US /sɜː(ɹ)ˈd͡ʒɛk.ʃən/

词形变化

surjections 复数 surjections

释义与例句

n.
  1. 1.

    A function for which every element of the codomain is mapped to by some element of the domain; (formally) Any function f:X→Y for which for every y∈Y, there is at least one x∈X such that f(x)=y.

    满射

    数学

词汇关系

名词

同义词 2

onto function surjective function

上位词 5

map function mapping mathematical function single-valued function

词源

From French surjection, introduced by Nicolas Bourbaki in their treatise Éléments de mathématique. Ultimately borrowed from Latin superiectiō (“a throwing over or on; (fig.) an exaggeration, a hyperbole”).

来源：wiktionary