I have no idea how to show whether this statement is false or true:
If every differentiable function on a subset $X\subseteq\mathbb{R}^n$ is bounded then $X$ is compact.
Thank you
I have no idea how to show whether this statement is false or true:
If every differentiable function on a subset $X\subseteq\mathbb{R}^n$ is bounded then $X$ is compact.
Thank you