Problem + Problem 1.57 Prove that the $C^{\infty}$ map $$ \Psi: \mathbb{R} \rightarrow \mathbb{R}^{2}, \quad t \mapsto(x, y)=\left(t^{2}, t^{3}\right) $$ (see Fig. 1.18) is not an immersion. Worked solution Sign in to view