surjection

名词 n.
中文释义

英文释义

名词 n.
  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.
    — In some special cases, however, the number of surjections A#92;rightarrowB can be identified.

词形变化

surjections plural

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”).
0 次浏览 数据来源: Wiktionary