preimage

Etymology
.

Noun

 * 1)  For a given function, the set of all elements of the domain that are mapped into a given subset of the codomain;  given a function ƒ : X → Y and a subset B ⊆ Y, the set ƒ−1(B) = {x ∈ X : ƒ(x) ∈ B}.
 * 2) * 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.
 * The preimage of a neighborhood U of 0 in E must be a neighborhood of (0,x), since (0,x) is mapped into 0.

Translations

 * Chinese:
 * Mandarin:
 * Esperanto: prabildo, kontraŭbildo, malbildo
 * Finnish: alkukuva
 * French: ,
 * German:
 * Polish:
 * Portuguese: pré-imagem
 * Spanish: imagen inversa, antiimagen, contraimagen