Inverse function
= Inverse function
{wiki}
If a function $f:X\to Y$ is bijective, its inverse function $f^{-1}:Y\to X$ is characterized by $f^{-1}(f(x))=x$ and $f(f^{-1}(y))=y$.
= Inverse function
{wiki}
If a function $f:X\to Y$ is bijective, its inverse function $f^{-1}:Y\to X$ is characterized by $f^{-1}(f(x))=x$ and $f(f^{-1}(y))=y$.