Preimage
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English
Etymology
From Template:Prefix.
Pronunciation
Noun
- Template:Lb For a given function, the set of all elements of the domain that are mapped into a given subset of the codomain; Template:Lb given a function ƒ : X → Y and a subset B ⊆ Y, the set ƒ−1(B) = {x ∈ X : ƒ(x) ∈ B}.
- 1967 [Academic Press], Francois Treves, Topological Vector Spaces, Distributions and Kernels, 2006, Dover, page 22,
- The preimage of a neighborhood U of 0 in E must be a neighborhood of (0,x), since (0,x) is mapped into 0.
- Template:Quote-book
- Template:Quote-book
- 1967 [Academic Press], Francois Treves, Topological Vector Spaces, Distributions and Kernels, 2006, Dover, page 22,
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