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We classify four-dimensional manifolds endowed with symplectic pairs admitting embedded symplectic spheres with non-negative self-intersection, following the strategy of McDuff's classification of rational and ruled symplectic four…

Symplectic Geometry · Mathematics 2019-03-05 Gianluca Bande , Paolo Ghiggini

A new approach for constructing minimal submanifolds of codimension 1 in the round spheres is proposed. In the case of $\mathbb{S}^3$ two immersions of the Clifford torus and all Lawson $\tau_{n, m}$ surfaces are described in terms of…

Differential Geometry · Mathematics 2025-01-22 Aleksei Kislitsyn

In this paper, we prove that for an $n$-dimensional closed minimal Willmore hypersurface $M^n$ with constant scalar curvature in the unit sphere $\mathbb{S}^{n+1}$, the squared norm $S$ of the second fundamental form of $M^n$ satisfies…

Differential Geometry · Mathematics 2025-12-10 Jianquan Ge , Huixin Tan , Wenjiao Yan , Yunheng Zhang

In 3-dimensional Euclidean space, Scherk second surfaces are singly periodic embedded minimal surfaces with four planar ends. In this paper, we obtain a natural generalization of these minimal surfaces in any higher dimensional Euclidean…

Differential Geometry · Mathematics 2007-05-23 Frank Pacard

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

We introduce a class of minimal submanfolds $M^n$, $n\geq 3$, in spheres $\mathbb{S}^{n+2}$ that are ruled by totally geodesic spheres of dimension $n-2$. If simply-connected, such a submanifold admits a one-parameter associated family of…

Differential Geometry · Mathematics 2016-03-10 Marcos Dajczer , Theodoros Vlachos

We construct examples of embedded flexible cross-polytopes in the spheres of all dimensions. These examples are interesting from two points of view. First, in dimensions 4 and higher, they are the first examples of embedded flexible…

Metric Geometry · Mathematics 2024-11-20 Alexander A. Gaifullin

In this paper, we prove that a closed minimally immersed hypersurface $M^4\subset\mathbb S^5$ with constant $S:=\sum\limits_{i=1}^4\lambda_i^2$ and $A_3:=\sum\limits_{i=1}^4\lambda_i^3$ whose scalar curvature $R_M$ is nonnegative must be…

Differential Geometry · Mathematics 2025-04-01 Joel Spruck , Ling Xiao

In this paper, we prove that a closed minimal hypersurface in $\SSS$ with $\lambda_1<n$ has Morse index at least $n+4$, providing a partial answer to a conjecture of Perdomo. As a corollary, we re-obtain a partial proof of the famous Urbano…

Differential Geometry · Mathematics 2024-05-20 Hang Chen , Peng Wang

For embedded 2-spheres in a 4-manifold sharing the same embedded transverse sphere homotopy implies isotopy, provided the ambient 4-manifold has no $\BZ_2$-torsion in the fundamental group. This gives a generalization of the classical light…

Geometric Topology · Mathematics 2020-06-30 David Gabai

Building on work of Kapouleas and Yang, we construct sequences of minimal surfaces embedded in the round 3-sphere which converge to the Clifford torus counted with multiplicity two and have second fundamental form blowing up at every point…

Differential Geometry · Mathematics 2015-03-03 David Wiygul

There are many four vertex type theorems appearing in the literature, coming in both smooth and discrete flavors. The most familiar of these is the classical theorem in differential geometry, which states that the curvature function of a…

Metric Geometry · Mathematics 2023-02-09 Wiktor Mogilski , Kyle Grant

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

In this paper we completely classify the homogeneous two-spheres, especially, the minimal homogeneous ones in the quaternionic projective space $\textbf{HP}^n$. According to our classification, more minimal constant curved two-spheres in…

Differential Geometry · Mathematics 2018-06-25 Jie Fei , Chiakuei Peng , Xiaowei Xu

The first part of the article surveys some work on the Chern-Moser-Weyl tensor and its application in the embeddability problem into hyperquadrics. In the last section, we give a negative answer to a folklore conjecture concerning the…

Complex Variables · Mathematics 2016-06-30 Xiaojun Huang , Ming Xiao

We show vanishing results about the infimum of the topological entropy of the geodesic flow of homogeneous smooth four manifolds. We prove that any closed oriented geometric four manifold has zero minimal entropy if and only if it has zero…

Geometric Topology · Mathematics 2014-10-01 Pablo Suárez-Serrato

In this survey, we discuss various aspects of the minimal surface equation in the three-sphere S^3. After recalling the basic definitions, we describe a family of immersed minimal tori with rotational symmetry. We then review the known…

Differential Geometry · Mathematics 2013-07-29 S. Brendle

The entropy of a hypersurface is a geometric invariant that measures complexity and is invariant under rigid motions and dilations. It is given by the supremum over all Gaussian integrals with varying centers and scales. It is monotone…

Differential Geometry · Mathematics 2012-05-10 Tobias Holck Colding , Tom Ilmanen , William P. Minicozzi , Brian White

Minimal surfaces and domain walls play important roles in various contexts of spacetime physics as well as material science. In this paper, we first review the Bernstein conjecture, which asserts that a plane is the only globally well…

High Energy Physics - Theory · Physics 2009-09-28 Gary W. Gibbons , Kei-ichi Maeda , Umpei Miyamoto

It is shown that each quadrangulation of the 2-torus by the Cartesian product of two cycles can be geometrically realized in (Euclidean) 4-space without hidden symmetries---that is, so that each combinatorial cellular automorphism of the…

Metric Geometry · Mathematics 2014-09-16 Serge Lawrencenko