# Example of a continuous bijection on $\mathbb R^n$ whose inverse is not continuous [duplicate]

For $n \ge 2$ give example of a bijective continuous map $f: \mathbb R^n \to \mathbb R^n$ whose inverse is not continuous ; example of such a function is also an example of Does there exist a bijection of $\mathbb{R}^n$ with itself such that the forward map is connected but the inverse is not?

## marked as duplicate by Gerry Myerson, Najib Idrissi, AlexR, drhab, DidOct 6 '14 at 9:11

• I edited my comment and provided a link. It is a theorem telling you that an injective continuous map $f : U \to \Bbb{R}^n$ with $U \subset \Bbb{R}^n$ open is always an open map, so that the inverse is also continuous. – PhoemueX Oct 6 '14 at 4:56