English

Extendability of conformal structures on punctured surfaces

Differential Geometry 2015-09-29 v1

Abstract

For a smooth immersion ff from the punctured disk D\{0}D\backslash\{0\} into Rn\mathbb{R}^n extendable continuously at the puncture, if its mean curvature is square integrable and the measure of f(D)Brk=o(rk)f(D)\cap B_{r_k}=o(r_k) for a sequence rk0r_k\to 0, we show that the Riemannian surface (Dr\{0},g)(D_r\backslash\{0\},g) where gg is the induced metric is conformally equivalent to the unit Euclidean punctured disk, for any r(0,1)r\in(0,1). For a locally W2,2W^{2,2} Lipschitz immersion ff from the punctured disk D2\{0}D_2\backslash\{0\} into Rn\mathbb{R}^n, if fL\|\nabla f\|_{L^\infty} is finite and the second fundamental form of ff is in L2L^2, we show that there exists a homeomorphism ϕ:DD\phi:D\to D such that fϕf\circ\phi is a branched W2,2W^{2,2}-conformal immersion from the Euclidean unit disk DD into Rn\mathbb{R}^n.

Keywords

Cite

@article{arxiv.1509.08061,
  title  = {Extendability of conformal structures on punctured surfaces},
  author = {Jingyi Chen and Yuxiang Li},
  journal= {arXiv preprint arXiv:1509.08061},
  year   = {2015}
}

Comments

19 pages

R2 v1 2026-06-22T11:06:20.493Z