Submitted by math_admin on Sat, 02/22/2020 - 21:44
preprint-id:
preprint-title:
On Removable Sets for Sobolev Spaces in the Plane
preprint-abstract:
Let $K$ be a compact subset of $\bar{\textbf{C}} ={\textbf{R}}^2$ and let $K^c$ denote its complement. We say $K\in HR$, $K$ is holomorphically removable, if whenever $F:\bar{\textbf{C}} \to\bar{\textbf{C}}$ is a homeomorphism and $F$ is holomorphic off $K$, then $F$ is a Möbius transformation. By composing with a Möbius transform, we may assume $F(\infty )=\infty$. The contribution of this paper is to show that a large class of sets are $HR$. Our motivation for these results is that these sets occur naturally (e.g. as certain Julia sets) in dynamical systems, and the property of being $HR$ plays an important role in the Douady-Hubbard description of their structure.
preprint-year:
1991