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In this paper, we study the $k$-cylindrical singular set of mean curvature flow in $\mathbb R^{n+1}$ for each $1\leq k\leq n-1$. We prove that they are locally contained in a $k$-dimensional $C^{2,\alpha}$-submanifold after removing some…

微分几何 · 数学 2025-09-03 Ao Sun , Zhihan Wang , Jinxin Xue

In this paper, we study biharmonic hypersurfaces in a product of an Einstein space and a real line. We prove that a biharmonic hypersurface with constant mean curvature in such a product is either minimal or a vertical cylinder generalizing…

微分几何 · 数学 2019-06-06 Yu Fu , Shun Maeta , Ye-Lin Ou

In this paper, we survey known results on closed self-shrinkers for mean curvature flow and discuss techniques used in recent constructions of closed self-shrinkers with classical rotational symmetry. We also propose new existence and…

微分几何 · 数学 2017-08-31 Gregory Drugan , Hojoo Lee , Xuan Hien Nguyen

In this article we prove existence and symmetry properties of periodic surfaces of revolution with constant anisotropic nonlocal mean curvature, generalizing a classical result of Delaunay to the anisotropic nonlocal setting. First, by…

偏微分方程分析 · 数学 2026-02-23 Francesc Alcover , Renzo Bruera

We extend the estimate obtained in [1] for the mean curvature of a cylindrically bounded proper submanifold in a product manifold with an Euclidean space as one factor to a general product ambient space endowed with a warped product…

微分几何 · 数学 2011-07-08 Luis J. Alias , Marcos Dajczer

The distance of an almost constant mean curvature boundary from a finite family of disjoint tangent balls with equal radii is quantitatively controlled in terms of the oscillation of the scalar mean curvature. This result allows one to…

偏微分方程分析 · 数学 2015-04-13 Giulio Ciraolo , Francesco Maggi

We obtain existence of double bubbles of large and constant mean curvatures in Riemannian manifolds. These arise as perturbations of geodesic standard double bubbles centered at critical points of the ambient scalar curvature and aligned…

微分几何 · 数学 2021-12-16 Gianmichele Di Matteo , Andrea Malchiodi

In this exposition-type note we present detailed proofs of certain assertions concerning several algebraic properties of the cone and cylinder algebras. These include a determination of the maximal ideals, the solution of the B\'ezout…

环与代数 · 数学 2016-02-17 Raymond Mortini , Rudolf Rupp

Self-shrinkers model singularities of the mean curvature flow; they are defined as the special solutions that contract homothetically under the flow. Colding-Ilmanen-Minicozzi showed that cylindrical self-shrinkers are rigid in a strong…

微分几何 · 数学 2019-08-06 Qiang Guang , Jonathan J. Zhu

We establish {\L}ojasiewicz inequalities for a class of cylindrical self-shrinkers for the mean curvature flow, which includes round cylinders and cylinders over Abresch-Langer curves, in any codimension. We deduce the uniqueness of blowups…

微分几何 · 数学 2024-09-18 Jonathan J. Zhu

We show existence of constant mean curvature 1 surfaces in both hyperbolic 3-space and de Sitter 3-space with two complete embedded ends and any positive genus up to genus twenty. We also find another such family of surfaces in de Sitter…

微分几何 · 数学 2010-10-27 Shoichi Fujimori , Wayne Rossman

The class of $W$-congruences is a central object of Projective Differential Geometry. Nevertheless, their singularities has not been extensively studied. In this paper we prove a characterization of $W$-congruences that allow us to study…

微分几何 · 数学 2025-12-29 Marcos Craizer , Ronaldo Alves Garcia

We systematically introduce and study a new type of singularities, namely, exceptionally non-canonical (enc) singularities. This class of singularities plays an important role in the study of many questions in birational geometry, and has…

代数几何 · 数学 2025-01-29 Jingjun Han , Jihao Liu

It has long been conjectured that starting at a generic smooth closed embedded surface in R^3, the mean curvature flow remains smooth until it arrives at a singularity in a neighborhood of which the flow looks like concentric spheres or…

微分几何 · 数学 2009-08-27 Tobias H. Colding , William P. Minicozzi

In this paper, we develop a min-max theory for the construction of constant mean curvature (CMC) hypersurfaces of prescribed mean curvature in an arbitrary closed manifold. As a corollary, we prove the existence of a nontrivial, smooth,…

微分几何 · 数学 2017-08-14 Xin Zhou , Jonathan J. Zhu

We prove that there are no regular algebraic hypersurfaces with non-zero constant mean curvature in the Euclidean space $\mathbb R^{n+1}$, $n\geq 2$, defined by polynomials of odd degree. Also we prove that the hyperspheres and the round…

微分几何 · 数学 2021-10-22 Alexandre Paiva Barreto , Francisco Fontenele , Luiz Hartmann

Given a closed orientable Euclidean cone 3-manifold C with cone angles less than or equal to pi, and which is not almost product, we describe the space of constant curvature cone structures on C with cone angles less than pi. We establish a…

几何拓扑 · 数学 2014-11-11 Joan Porti , Hartmut Weiss

We determine all helix surfaces with parallel mean curvature vector field, which are not minimal or pseudo-umbilical, in spaces of type $M^n(c)\times\mathbb{R}$, where $M^n(c)$ is a simply-connected $n$-dimensional manifold with constant…

微分几何 · 数学 2015-06-18 Dorel Fetcu

We apply the evolution method to present a new proof of the Alexandrov type theorem for constant anisotropic mean curvature hypersurfaces in the Euclidean space $\mathbb{R}^{n+1}$.

微分几何 · 数学 2013-02-14 Hui Ma , Changwei Xiong

In this paper, we derive curvature estimates for strongly stable hypersurfaces with constant mean curvature immersed in $\mathbb{R}^{n+1}$, which show that the locally controlled volume growth yields a globally controlled volume growth if…

微分几何 · 数学 2012-12-17 Jinpeng Lu