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A new functional for simplicial surfaces is suggested. It is invariant with respect to Moebius transformations and is a discrete analogue of the Willmore functional. Minima of this functional are investigated. as an application a bending…

Differential Geometry · Mathematics 2017-08-25 Alexander I. Bobenko

In this paper we develop the theory of Willmore sequences for Willmore surfaces in the 4-sphere. We show that under appropriate conditions this sequence has to terminate. In this case the Willmore surface either is the twistor projection of…

Differential Geometry · Mathematics 2008-06-10 K. Leschke , F. Pedit

In this paper we prove that every bordered Riemann surface M admits a complete proper null holomorphic embedding into a ball of the complex Euclidean $3$-space $\mathbb{C}^3$. The real part of such an embedding is a complete conformal…

Complex Variables · Mathematics 2015-10-20 Antonio Alarcon , Franc Forstneric

We say that a topologically embedded 3-sphere in a smoothing of Euclidean 4-space is a barrier provided, roughly, no diffeomorphism of the 4-manifold moves the 3-sphere off itself. In this paper we construct infinitely many one parameter…

Geometric Topology · Mathematics 2007-05-23 Laurence R. Taylor

We consider a closed Willmore surface properly immersed in ${\R}^m$ (m>2) with square-integrable second fundamental form, and with one point-singularity of finite arbitrary integer order. Using the "conservative" reformulation of the…

Analysis of PDEs · Mathematics 2016-01-20 Yann Bernard , Tristan Rivière

We study various aspects related to boundary regularity of complete properly embedded Willmore surfaces in H3, particularly those related to assumptions on boundedness or smallness of a certain weighted version of the Willmore energy. We…

Differential Geometry · Mathematics 2016-11-26 Spyros Alexakis , Rafe Mazzeo

We show the existence of a smooth spherical surface minimizing the Willmore functional subject to an area constraint in a compact Riemannian three-manifold, provided the area is small enough. Moreover, we classify complete surfaces of…

Differential Geometry · Mathematics 2015-06-03 Tobias Lamm , Jan Metzger

We consider an energy functional on surface immersions which includes contributions from both boundary and interior. Inspired by physical examples, the boundary is modeled as the center line of a generalized Kirchhoff elastic rod, while the…

Differential Geometry · Mathematics 2021-10-29 Anthony Gruber , Álvaro Pámpano , Magdalena Toda

We prove that finite area isolated singularities of surfaces with constant positive curvature in R^3 are removable singularities, branch points or immersed conical singularities. We describe the space of immersed conical singularities of…

Differential Geometry · Mathematics 2010-07-16 Jose A. Galvez , Laurent Hauswirth , Pablo Mira

We establish an energy quantization for constrained Willmore surfaces, where the constraints are given by area, volume, and total mean curvature, assuming that the underlying conformal structures remain bounded. Furthermore, we show strong…

Differential Geometry · Mathematics 2025-05-27 Christian Scharrer , Alexander West

We use Bryant Representation to construct constant mean curvature one surfaces in hyperbolic space that desingularize a horosphere packing.

Differential Geometry · Mathematics 2014-04-01 Martin Traizet

We prove a monotonicity identity for compact surfaces with free boundaries inside the boundary of unit ball in $\mathbb R^n$ that have square integrable mean curvature. As one consequence we obtain a Li-Yau type inequality in this setting,…

Differential Geometry · Mathematics 2014-02-20 Alexander Volkmann

We consider the generalization of classical Blaschke's Problem to higher codimension case, characterizing Darboux pair of isothermic surfaces and dual S-Willmore surfaces as the only non-trivial surface pairs that envelop a 2-sphere…

Differential Geometry · Mathematics 2008-11-26 Xiang Ma

First introduced to describe surfaces embedded in $\mathbb{R}^3$, the Willmore invariant is a conformally-invariant extrinsic scalar curvature of a surface that vanishes when the surface minimizes bending and stretching. Both this invariant…

Differential Geometry · Mathematics 2022-01-25 Samuel Blitz

We obtain in arbitrary codimension a removability result on the order of singularity of Willmore surfaces realising the width of Willmore min-max problems on spheres. As a consequence, out of the twelve families of non-planar minimal…

Analysis of PDEs · Mathematics 2019-04-23 Alexis Michelat , Tristan Rivière

In this work, we consider the three-dimensional solid-state dewetting with strongly anisotropic surface energy, assuming an axisymmetric morphology of the thin film. However, when surface energy exhibits strong anisotropy, certain…

Numerical Analysis · Mathematics 2025-01-09 Meng Li , Chunjie Zhou

We show that the quantization of energy for Willmore spheres into closed Riemannian manifolds holds provided that the Willmore energy and the area are uniformly bounded. The analogous energy quantization result holds for Willmore surfaces…

Analysis of PDEs · Mathematics 2021-12-28 Alexis Michelat , Andrea Mondino

According to a conjecture attributed to Hartshorne and Lichtenbaum and proven by Ellingsrud and Peskine, the smooth rational surfaces in $\mathbb{P}^4$ belong to only finitely many families. We formulate and study a collection of analogous…

Algebraic Geometry · Mathematics 2018-01-26 Benjamin Diamond

We present a global representation for surfaces in 3-dimensional hyperbolic space with constant mean curvature 1 (CMC-1 surfaces) in terms of holomorphic spinors. This is a modification of Bryant's representation. It is used to derive…

Differential Geometry · Mathematics 2007-05-23 Alexander I. Bobenko , Tatyana V. Pavlyukevich , Boris A. Springborn

We view conformal surfaces in the 4--sphere as quaternionic holomorphic curves in quaternionic projective space. By constructing enveloping and osculating curves, we obtain new holomorphic curves in quaternionic projective space and thus…

Differential Geometry · Mathematics 2008-06-10 K. Leschke , F. Pedit