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inverse function

Definitions of inverse function
  1. noun
    a function obtained by expressing the dependent variable of one function as the independent variable of another; f and g are inverse functions if f(x)=y and g(y)=x
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    type of:
    function, map, mapping, mathematical function, single-valued function
    (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)
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