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Continuum theory, point-set topology, spaces with algebraic structure, foundations, dimension theory, local and global properties.

8 votes
1 answer
699 views

Immersion of $S^1$ in $\mathbb{R}^2$ that can be extended to $\mathbb{D}$

I was wondering about $\mathcal{C}^{\infty}$ immersions $S^1 \longrightarrow \mathbb{R}^2$ which are the restriction to $\partial \mathbb{D}$ of an immersion $\overline{\mathbb{D}} \longrightarrow \m …
Selim G's user avatar
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