preimage (English, noun)
expansion: preimage (plural preimages)
Senses:
topics: mathematics
sciences
glosses: For a given function, the set of all elements of the domain that are mapped into a given subset of the codomain; (formally) given a function ƒ : X → Y and a subset B ⊆ Y, the set ƒ⁻¹(B) = {x ∈ X : ƒ(x) ∈ B}.
Forms:
form: preimages
tags: plural