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In this article, we investigate a flow of inverse mean curvature type for capillary hypersurfaces in the half-space. We establish the global existence of solutions for this flow and demonstrate that it converges smoothly to a spherical cap…

Analysis of PDEs · Mathematics 2024-07-30 Guofang Wang , Liangjun Weng , Chao Xia

This paper introduces the \textit{anisotropic $\omega_0$-capillary $p$-sum} of two hypersurfaces in $\mathbb{R}_+^{n+1}$, and establishes a theory for anisotropic capillary convex bodies. For a smooth convex hypersurface $\Sigma $ with…

Differential Geometry · Mathematics 2026-03-03 Shanwei Ding , Jinyu Gao , Guanghan Li , Mengliang Liu

In this article, we introduce a $k$-th capillary area measure for capillary convex bodies in the Euclidean half-space, which serves as a boundary counterpart to the classical concept of area measure (see, e.g., \cite[Chapter 8]{Sch}). We…

Analysis of PDEs · Mathematics 2026-05-19 Xinqun Mei , Guofang Wang , Liangjun Weng

The classical Minkowski formula is extended to spacelike codimension-two submanifolds in spacetimes which admit "hidden symmetry" from conformal Killing-Yano two-forms. As an application, we obtain an Alexandrov type theorem for spacelike…

Differential Geometry · Mathematics 2016-07-05 Mu-Tao Wang , Ye-Kai Wang , Xiangwen Zhang

We consider an infinitesimal version of the Bishop-Gromov relative volume comparison condition as generalized notion of Ricci curvature bounded below for Alexandrov spaces. We prove a Laplacian comparison theorem for Alexandrov spaces under…

Differential Geometry · Mathematics 2007-09-07 Kazuhiro Kuwae , Takashi Shioya

In the first part of this paper, we consider a partially overdetermined mixed boundary value problem in space forms and generalize the main result in \cite{GX} into the case of general domains with partial umbilical boundary in space forms.…

Analysis of PDEs · Mathematics 2022-08-16 Jinyu Guo , Chao Xia

In this article, we study a locally constrained fully nonlinear curvature flow for convex capillary hypersurfaces in half-space. We prove that the flow preserves the convexity, exists for all time, and converges smoothly to a spherical cap.…

Analysis of PDEs · Mathematics 2025-02-20 Xinqun Mei , Liangjun Weng

In this paper we give a new proof for an almost isometry theorem in Alexandrov spaces with curvature bounded below.

Differential Geometry · Mathematics 2010-06-29 Xiaole Su , Hongwei Sun , Yusheng Wang

In this paper we prove Bernstein type theorems for a class of stationary points of the Alt-Caffarelli functional in $\mathbb R^2$ and $\mathbb R^3$.

Analysis of PDEs · Mathematics 2020-01-08 Aram L. Karakhanyan

It is shown that convex hypersurfaces in Hilbert spaces have nonnegative Alexandrov curvature. This extends an earlier result of Buyalo for convex hypersurfaces in Riemannian manifolds of finite dimension.

Metric Geometry · Mathematics 2009-12-15 Jonathan Dahl

We prove some Bernstein theorems for entire space-like submanifolds in pseudo-Euclidean spaces and, as a corollary, we obtain a new proof of the Calabi-Pogorelov theorem on global solutions of Monge-Ampere equations.

Differential Geometry · Mathematics 2007-05-23 Juergen Jost , Yuan-Long Xin

We generalize a theorem by J. Choe on capillary surfaces for arbitrary 3-dimensional spaces of constant curvature. The main tools in this paper are an extension of a theorem of H. Hopf due to S.-S. Chern and two index lemmas by J. Choe.

Differential Geometry · Mathematics 2007-05-23 Alexander Arbieto , Carlos Matheus , Marcos Petrucio

Aleksandrov surfaces are a generalization of two-dimensional Riemannian manifolds, and it is known that every open simply connected Aleksandrov surface is conformally equivalent either to the unit disc (hyperbolic case) or to the plane…

Complex Variables · Mathematics 2014-12-15 Byung-Geun Oh

It is proved that a convex hypersurface in a Riemannian manifold of sectional curvature at least k is an Alexandrov's space of curvature at least k. This theorem provides an optimal lower curvature bound for an older theorem of Buyalo.

Differential Geometry · Mathematics 2013-03-26 Stephanie Alexander , Vitali Kapovitch , Anton Petrunin

We obtain a bound for the area of a capillary $H-$surface in a three-manifold with umbilic boundary and controlled sectional curvature. We then analyze the geometry when this area bound is realized, and obtain rigidity theorems. As a side…

Differential Geometry · Mathematics 2016-04-19 José M. Espinar , Harold Rosenberg

We prove a generalization of Hsiung-Minkowski formulas for closed submanifolds in semi-Riemannian manifolds with constant curvature. As a corollary, we obtain volume and area upper bounds for k-convex hypersurfaces in terms of a weighted…

Differential Geometry · Mathematics 2014-07-17 Kwok-Kun Kwong

We show that any n-dimensional nonnegatively curved Alexandrov space with the maximal possible number of extremal points is isometric to a quotient space of Euclidean n -space by an action of a crystallographic group. We describe all such…

Metric Geometry · Mathematics 2015-06-03 Nina Lebedeva

Under an infinitesimal version of the Bishop-Gromov relative volume comparison condition for a measure on an Alexandrov space, we prove a topological splitting theorem of Cheeger-Gromoll type. As a corollary, we prove an isometric splitting…

Differential Geometry · Mathematics 2010-10-01 Kazuhiro Kuwae , Takashi Shioya

In this paper, we study the locally constrained inverse curvature flow for hypersurfaces in the half-space with $\theta$-capillary boundary, which was recently introduced by Wang-Weng-Xia. Assume that the initial hypersurface is strictly…

Differential Geometry · Mathematics 2025-08-28 Yingxiang Hu , Yong Wei , Bo Yang , Tailong Zhou

We develop an Aleksandrov reflection framework for a large class of expanding curvature flows in hyperbolic space, with inverse mean curvature flow serving as a model case. The method applies to the level-set formulation of the flow. As a…

Differential Geometry · Mathematics 2026-02-13 Theodora Bourni , José M. Espinar , Aakash Mishra