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This paper studies Riemannian manifolds of the form $M \setminus S$, where $M^4$ is a complete four dimensional Riemannian manifold with finite volume whose metric is modeled on the complex hyperbolic plane $\mathbb{C} \mathbb{H}^2$, and…

Differential Geometry · Mathematics 2023-07-31 Barry Minemyer

We consider the class of all conformal mappings from a compact Riemann surface into the threedimensional or fourdimensional Euclidean space. A sequence in this class with bounded Willmore functional is shown to have a sequence of conformal…

Differential Geometry · Mathematics 2007-05-23 Martin Ulrich Schmidt

We show that for every $\epsilon>0$, there exists a compact lamination by $\epsilon$-holomorphic surfaces in the complex projective plane, minimal, and that carries hyperbolic holonomy. We call $\epsilon$-holomorphic a real 2-dimensional…

Dynamical Systems · Mathematics 2007-05-23 Bertrand Deroin

We study the space of conformal immersions of a 2-torus into the 4-sphere. The moduli space of generalized Darboux transforms of such an immersed torus has the structure of a Riemann surface, the spectral curve. This Riemann surface arises…

Differential Geometry · Mathematics 2012-12-21 C. Bohle , K. Leschke , F. Pedit , U. Pinkall

Let $M$ be an open Riemann surface and $n\ge 3$ be an integer. We prove that on any closed discrete subset of $M$ one can prescribe the values of a conformal minimal immersion $M\to\mathbb{R}^n$. Our result also ensures jet-interpolation of…

Differential Geometry · Mathematics 2018-10-10 Antonio Alarcon , Ildefonso Castro-Infantes

Liebmann's Theorem asserts that a compact, connected, convex surface with constant mean curvature (CMC) in the Euclidean space must be a totally umbilical sphere. In this article we extend Liebmann's result to hypersurfaces with boundary.…

Differential Geometry · Mathematics 2025-08-26 Flávio França Cruz , Barbara Nelli

We give a definition of isoclinic parametric surfaces in $\mathbb{R}^4_2$ and prove that such an isoclinic conformal immersion comes from two holomorphic functions. A Cauchy problem was proposed and solved, namely: construct an isoclinic…

Differential Geometry · Mathematics 2019-06-04 Alexandre Lymberopoulos , Antonio de Padua Franco Filho , Anuar Enrique Paternina Montalvo

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 reformulate the problem of finding conformal immersions of closed Riemannian surfaces in the language of the $h$-principle and we prove that the inclusion from the space of smooth conformal immersions to the space of immersions induces a…

Differential Geometry · Mathematics 2026-03-04 Alaa Boukholkhal

Given a closed surface S of genus at least 2, we compare the symplectic structure of Taubes' moduli space of minimal hyperbolic germs with the Goldman symplectic structure on the character variety X(S, PSL(2,C)) and the affine cotangent…

Differential Geometry · Mathematics 2014-12-30 Brice Loustau

We study isometric immersions $f: M^n \rightarrow \mathbb{H}^{n+1}$ into hyperbolic space of dimension $n+1$ of a complete Riemannian manifold of dimension $n$ on which a compact connected group of intrinsic isometries acts with principal…

Differential Geometry · Mathematics 2024-08-08 Felippe Guimarães , Fernando Manfio , Carlos E. Olmos

In this paper we develop a global correspondence between immersed horospherically convex hypersurfaces in hyperbolic space and complete conformal metrics on domains in the sphere. We establish results on when the hyperbolic Gauss map is…

Differential Geometry · Mathematics 2012-12-07 Vincent Bonini , Jose Espinar , Jie Qing

Since the work of Ellingsrud and Peskine at the end of 1980s, it has been known that, with the exception of a finite number of families, smooth compact complex surfaces in $\mathbb{P}^4$ with prescribed Chern classes must lie on…

Algebraic Geometry · Mathematics 2016-09-14 Daniel Naie , Igor Reider

In this paper, we show the existence of smoothly embedded closed minimal surfaces in infinite volume hyperbolic $3$-manifolds except some special cases.

Differential Geometry · Mathematics 2021-05-12 Baris Coskunuzer

The goal of this work is to give new quantitative results about the distribution of semi-arithmetic hyperbolic surfaces in the moduli space of closed hyperbolic surfaces. We show that two coverings of genus $g$ of a fixed arithmetic surface…

Geometric Topology · Mathematics 2024-03-20 Cayo Dória , Nara Paiva

We introduce decorated piecewise hyperbolic and spherical surfaces and discuss their discrete conformal equivalence. A decoration is a choice of circle about each vertex of the surface. Our decorated surfaces are closely related to…

Geometric Topology · Mathematics 2023-10-27 Alexander I. Bobenko , Carl O. R. Lutz

Given a smooth compact hypersurface $M$ with boundary $\Sigma=\partial M$, we prove the existence of a sequence $M_j$ of hypersurfaces with the same boundary as $M$, such that each Steklov eigenvalue $\sigma_k(M_j)$ tends to zero as $j$…

Spectral Theory · Mathematics 2018-11-29 Bruno Colbois , Alexandre Girouard , Antoine Métras

Let $\Sigma$ be a compact Riemann surface and $D_1,...,D_n$ a finite number of pairwise disjoint closed disks of $\Sigma$. We prove the existence of a proper harmonic map into the Euclidean plane from a hyperbolic domain $\Omega$ containing…

Differential Geometry · Mathematics 2009-06-16 Antonio Alarcon , Jose A. Galvez

We prove that closed surfaces of all topological types, except for the non-orientable odd-genus ones, can be minimally embedded in the Riemannian product of a sphere and a circle of arbitrary radius. We illustrate it by obtaining some…

Differential Geometry · Mathematics 2018-03-20 José M. Manzano , Julia Plehnert , Francisco Torralbo

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