INVERSEFUNCTION

Inverse function

In mathematics, an inverse function is a function that reverses another function: if the function applied to an input gives a result of, then applying the inverse function to gives the result, and vice versa. i.e., and . More directly,, meaning composed with form an identity.

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inverse function

Noun

  1. A function that does exactly the opposite of another; formally g is the inverse function of a function f if and only if: <math>\forall x . f(x) = y \implies g(y) = x</math>. Notation: <math>f^{-1}</math>.
    Halving is the inverse function of doubling.


The above text is a snippet from Wiktionary: inverse function
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