Ivan Shishkin, Birch Grove

Surjective map

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A surjective map is a map which has an antecedent for each element of its set of destination.

Formal definition

If f:E→Ff: E \rightarrow F, for all y∈Fy \in F, ∃x∈E\exists x \in E such as f(x)=yf(x)=y.

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