Hi--
Let $f: \mathbb{R}^{n} \to \mathbb{R}^{m}$ be an Injection. If injection for $n>m$ then can n>m$. Can $f$ be continuous. ? Why.?
I got this question in my mind when i I was trying to find a continuous map from $\mathbb{R}^{2} \\mathbb{R}^{2}$ to \mathbb{R}$.$\mathbb{R}$.

