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Let $L$ be a compact oriented Lagrangian surface in a K\"ahler surface endowed with a complete Riemannian metric (compatible with the symplectic structure and the complex structure) with bounded sectional curvatures and a positive lower…

Differential Geometry · Mathematics 2025-05-27 Jingyi Chen

We combine Freedman's topology with Eliashberg's holomorphic theory to construct Stein neighborhood systems in complex surfaces, and use these to study various notions of convexity and concavity. Every tame, topologically embedded 2-complex…

Geometric Topology · Mathematics 2023-09-22 Robert E. Gompf

We enlarge the class of open Riemann surfaces known to be holomorphically embeddable into the plane by allowing them to have additional isolated punctures compared to the known embedding results.

Complex Variables · Mathematics 2019-06-05 Frank Kutzschebauch , Pierre-Marie Poloni

In this note, we study minimal Lagrangian surfaces in $\mathbb{B}^4$ with Legendrian capillary boundary on $\mathbb{S}^3$. On the one hand, we prove that any minimal Lagrangian surface in $\mathbb{B}^4$ with Legendrian free boundary on…

Differential Geometry · Mathematics 2020-07-08 Yong Luo , Linlin Sun

The symmetries of surfaces which can be embedded into the symmetries of the 3-dimensional Euclidean space $\mathbb{R}^3$ are easier to feel by human's intuition. We give the maximum order of finite group actions on $(\mathbb{R}^3, \Sigma)$…

Geometric Topology · Mathematics 2017-04-24 Chao Wang , Shicheng Wang , Yimu Zhang , Bruno Zimmermann

The Blaschke rolling disk theorem is a classical inclusion principle in differential geometry. This states that a planar convex domain whose boundary is a curve of class $C^2$ with (signed) curvature not exceeding a positive constant…

Differential Geometry · Mathematics 2021-04-13 José Ayala

In this paper we obtain the following results: (1) Any compact Stein surface with boundary embeds naturally into a symplectic Lefschetz fibration over the 2-sphere. (2) There exists a minimal elliptic fibration over the 2-disk, which is not…

Geometric Topology · Mathematics 2018-06-27 Selman Akbulut , Burak Ozbagci

We extend the hierarchy functors of [33] to the case of strong symplectic cobordisms, via deformations with Maurer--Cartan elements. In particular, we prove that the concave boundary of a strong cobordism has finite algebraic planar torsion…

Symplectic Geometry · Mathematics 2025-12-24 Agustin Moreno , Zhengyi Zhou

The Weierstrass representation for minimal surfaces in $\mathbb{R}^3$ provides a flexible method for constructing minimal surfaces of arbitrary genus. The topological limitations of minimal surfaces interfere with this providing a more…

Differential Geometry · Mathematics 2016-04-29 Peter Connor

Those maps of a closed surface to the three-dimensional torus that are homotopic to embeddings are characterized. Particular attention is paid to the somewhat intricate case when the surface is nonorientable.

Geometric Topology · Mathematics 2007-05-23 Allan L. Edmonds

We consider two natural classes of minimal laminations in three-manifolds. Both classes may be thought of as limits - in different senses - of embedded minimal disks. In both cases, we prove that, under a natural geometric assumption on the…

Differential Geometry · Mathematics 2016-05-27 Jacob Bernstein , Giuseppe Tinaglia

We show that a 3-manifold containing an incompressible surface has topologically minimal surfaces of arbitrary high genus.

Geometric Topology · Mathematics 2013-01-22 Jung Hoon Lee

In this paper we develop an abstract theory for the Codazzi equation on surfaces, and use it as an analytic tool to derive new global results for surfaces in the space forms ${\bb R}^3$, ${\bb S}^3$ and ${\bb H}^3$. We give essentially…

Differential Geometry · Mathematics 2009-02-16 Juan A. Aledo , José M. Espinar , José A. Gálvez

We construct the first examples of rationally convex surfaces in the complex plane with hyperbolic complex tangencies. In fact, we give two very different types of rationally convex surfaces: those that admit analytic fillings by…

Symplectic Geometry · Mathematics 2025-02-06 Georgios Dimitroglou Rizell , Mark G. Lawrence

A translation structure on a surface is an atlas of charts to the plane so that the transition functions are translations. We allow our surfaces to be non-compact and infinite genus. We endow the space of all pointed surfaces equipped with…

Geometric Topology · Mathematics 2013-10-22 W. Patrick Hooper

We review the theory of intrinsic geometry of convex surfaces in the Euclidean space and prove the following theorem: if the surface of a convex body K contains arbitrary long closed simple geodesics, then K is an isosceles tetrahedron.

Differential Geometry · Mathematics 2018-10-01 Arseniy Akopyan , Anton Petrunin

It is a well known phenomenon that many classical minimal surfaces in Euclidean space also exist with higher dihedral symmetry. More precisely, these surfaces are solutions to free boundary problems in a wedge bounded by two vertical planes…

Differential Geometry · Mathematics 2024-01-02 Ramazan Yol

We show that a minimal disk satisfying the free boundary condition in a constant curvature ball of any dimension is totally geodesic. We weaken the condition to parallel mean curvature vector in which case we show that the disk lies in a…

Differential Geometry · Mathematics 2018-11-28 Ailana Fraser , Richard Schoen

We characterization hyperbolic metrics on compact surfaces with boundary using a variational principle. As a consequence, a new parametrization of the Teichmuller space of compact surface with boundary is produced. In the new…

Geometric Topology · Mathematics 2007-05-23 Feng Luo

We define discrete flat surfaces in hyperbolic 3-space from the perspective of discrete integrable systems and prove properties that justify the definition. We show how these surfaces correspond to previously defined discrete constant mean…

Differential Geometry · Mathematics 2017-09-22 Tim Hoffmann , Wayne Rossman , Takeshi Sasaki , Masaaki Yoshida
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