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We study points of moderately low degree on a curve $C$ over a number field, which is embedded on a nice toric surface $S$. Recently, Smith and Vogt related the linear equivalence classes of such points to intersections of $C$ with curves…

代数几何 · 数学 2025-08-07 Eden Granot

A number of results for C$^2$-smooth surfaces of constant width in Euclidean 3-space ${\mathbb{E}}^3$ are obtained. In particular, an integral inequality for constant width surfaces is established. This is used to prove that the ratio of…

微分几何 · 数学 2021-11-15 Brendan Guilfoyle , Wilhelm Klingenberg

In this study, we deal with the local structure of curves and surfaces immersed in a pseudo-isotropic space I_{p}^{3} that is a particular Cayley-Klein space. We provide the formulas of curvature, torsion and Frenet trihedron in order for…

微分几何 · 数学 2018-11-13 Muhittin Evren Aydin

We study compact minimal surfaces in the 3-sphere which are constructed by successive reflections from a minimal $n$-gon -- so-called minimal reflection surfaces. The minimal $n$-gon solves a free boundary problem in a fundamental piece of…

微分几何 · 数学 2024-06-19 Alexander I. Bobenko , Sebastian Heller , Nicolas Schmitt

We show the existence of constant mean curvature surfaces in the homology classes of closed 3-manifolds.

微分几何 · 数学 2020-01-03 Baris Coskunuzer

This paper deals with finding surfaces in $\mathbb{R}^3$ which are as close as possible to being flat and span a given contour such that the contour is a geodesic on the sought surface. We look for a surface which minimizes the total…

微分几何 · 数学 2024-07-30 Tom Gilat

We show how to assign to any immersed torus in $\R^3$ or $S^3$ a Riemann surface such that the immersion is described by functions defined on this surface. We call this surface the spectrum or the spectral curve of the torus. The spectrum…

微分几何 · 数学 2007-05-23 I. A. Taimanov

The spinor representation is developed and used to investigate minimal surfaces in ${\bfR}^3$ with embedded planar ends. The moduli spaces of planar-ended minimal spheres and real projective planes are determined, and new families of…

dg-ga · 数学 2008-02-03 Rob Kusner , Nick Schmitt

The main objective of this paper is to derive the Enneper-Weierstrass representation of minimal surfaces in $\mathbb{E}^3$ using the soliton surface approach. We exploit the Bryant-type representation of conformally parametrized surfaces in…

数学物理 · 物理学 2015-11-10 A Doliwa , A M Grundland

In the present paper, we discuss the singular minimal surfaces in a Euclidean 3-space R^{3} which are minimal. In fact, such a surface is nothing but a plane, a trivial outcome. However, a non-trivial outcome is obtained when we modify the…

微分几何 · 数学 2020-11-23 Muhittin Evren Aydin , Ayla Erdur , Mahmut Ergut

We give a local analytic characterization that a minimal surface in the 3-sphere $\, \ES^3 \subset \R^4$ defined by an irreducible cubic polynomial is one of the Lawson's minimal tori. This provides an alternative proof of the result by…

微分几何 · 数学 2014-07-14 Joe S. Wang

We construct stationary perturbations of a specific minimal surface with a circle of triple junctions in $\mathbb{R}^2 \times \mathbb{S}^1$, that satisfy given boundary data.

微分几何 · 数学 2025-03-04 Chen-Kuan Lee

A translation surface in the three-dimensional sphere $\mathbb{S}^3$ is a surface generated by the quaternionic product of two curves, called generating curves. In this paper, we present rigidity results for such surfaces. We introduce an…

微分几何 · 数学 2025-07-30 Tarcios Andrey Ferreira , João Paulo dos Santos

We generalize a result of Giroux which says that a closed surface in a contact $3$-manifold with Morse-Smale characteristic foliation is convex. Specifically, we show that the result holds in contact manifolds of arbitrary dimension. As an…

辛几何 · 数学 2020-07-02 Joseph Breen

Biconservative surfaces of Riemannian 3-space forms $N^3(\rho)$, are either constant mean curvature (CMC) surfaces or rotational linear Weingarten surfaces verifying the relation $3\kappa_1+\kappa_2=0$ between their principal curvatures…

微分几何 · 数学 2025-01-10 Stefano Montaldo , Alvaro Pampano

In this note we prove that any minimal $2$-torus in $S^4$ has Morse index at least $6$, with equality if and only if it is congruent to the Clifford torus in some great $S^3\subset S^4$.For a minimal $2$-torus in $S^n$ with vanishing Hopf…

微分几何 · 数学 2024-05-17 Rob Kusner , Peng Wang

We classify branched immersed disks in space forms with non-zero parallel mean curvature vector and non-orthogonal constant contact angle along the boundary in 4-dimensional space form. For higher codimensional case, we prove a codimension…

微分几何 · 数学 2026-01-21 Rui Gao , Miaomiao Zhu

In this paper we give new existence results for complete non-orientable minimal surfaces in $\mathbb{R}^3$ with prescribed topology and asymptotic behavior.

微分几何 · 数学 2014-07-17 Antonio Alarcon , Francisco J. Lopez

A general study of minimal surfaces of the Riemannian product of two spheres S^2xS^2 is tackled. We stablish a local correspondence between (non-complex) minimal surfaces of S^2xS^2 and certain pair of minimal surfaces of the sphere S^3.…

微分几何 · 数学 2013-01-09 Francisco Torralbo , Francisco Urbano

For a compact 3-manifold $M$ which is a circle bundle over a compact Riemann surface $\Sigma$ with even Euler number $e(M)$, and with a Riemannian metric compatible with the bundle projection, there exists a compact minimal surface $S$ in…

微分几何 · 数学 2014-02-26 Pablo M. Chacon , David L. Johnson