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Preimage vs Reimage - What's the difference?

preimage | reimage |

As a noun preimage

is the set containing exactly every member of the domain of a function such that the member is mapped by the function onto an element of a given subset of the codomain of the function. Formally, of a subset B of the codomain Y under a function ƒ, the subset of the domain X defined by.

As a verb reimage is

to completely replace the operating system (on a particular computer) with a preconfigured , typically as a drastic means of fixing problems.

preimage

English

(Function)

Noun

(en noun)
  • (mathematics) The set containing exactly every member of the domain of a function such that the member is mapped by the function onto an element of a given subset of the codomain of the function. Formally, of a subset B'' of the codomain ''Y'' under a function ƒ, the subset of the domain ''X defined by
    • f^{-1}(B) = \{x \in X : f(x) \in B\}.
    For example, the preimage of {4, 9} under the squaring function is the set {?3,?2,+2,+3}.

    Synonyms

    * inverse image

    Related terms

    * image

    reimage

    English

    Verb

    (reimag)
  • (computing) To completely replace the operating system (on a particular computer) with a preconfigured image, typically as a drastic means of fixing problems.