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We study geometric and topological properties of locally compact, geodesically complete spaces with an upper curvature bound. We control the size of singular subsets, discuss homotopical and measure-theoretic stratifications and regularity…

微分几何 · 数学 2018-07-19 Alexander Lytchak , Koichi Nagano

We prove a scalar-mean rigidity theorem for compact Riemannian manifolds with boundary in dimension less than five by developing a dimension reduction argument for mean curvature, which extends Schoen-Yau's dimension reduction argument for…

微分几何 · 数学 2025-03-06 Jinmin Wang , Zhichao Wang , Bo Zhu

This paper surveys and evaluates some popular state of the art methods for algorithmic curvature and normal estimation. In addition to surveying existing methods we also propose a new method for robust curvature estimation and evaluate it…

计算几何 · 计算机科学 2023-06-02 Jared Spang

This paper investigates the rigidity of bordered polyhedral surfaces. Using the variational principle, we show that bordered polyhedral surfaces are determined by boundary value and discrete curvatures on the interior edges. As a corollary,…

几何拓扑 · 数学 2023-08-17 Te Ba , Shengyu Li , Yaping Xu

In this paper we use the notion of stability for free boundary surfaces with constant higher order mean curvature to obtain rigidity results for $H_2$-surfaces with free boundary of a geodesic ball of a simply connected $3$-dimensional…

微分几何 · 数学 2023-05-03 Leonardo Damasceno , Maria Fernanda Elbert

Our goal is to identify the type and number of static equilibrium points of solids arising from fine, equidistant $n$-discretrizations of smooth, convex surfaces. We assume uniform gravity and a frictionless, horizontal, planar support. We…

微分几何 · 数学 2011-12-02 Gabor Domokos , Zsolt Langi , Timea Szabo

In this paper we consider the stability issue for the inverse problem of determining an unknown inclusion contained in an elastic body by all the pairs of measurements of displacement and traction taken at the boundary of the body. Both the…

偏微分方程分析 · 数学 2016-10-06 Antonino Morassi , Edi Rosset

Let $M$ be a compact $n$-dimensional Riemannian manifold with nonnegative Ricci curvature and mean convex boundary $\partial M$. Assume that the mean curvature $H$ of the boundary $\partial M$ satisfies $H \geq (n-1) k >0$ for some positive…

微分几何 · 数学 2020-01-06 Martin Li

The theory of integral quadratic constraints (IQCs) allows verification of stability and gain-bound properties of systems containing nonlinear or uncertain elements. Gain bounds often imply exponential stability, but it can be challenging…

系统与控制 · 计算机科学 2017-06-06 Ross Boczar , Laurent Lessard , Andrew Packard , Benjamin Recht

We prove a smooth compactness theorem for the space of elasticae, unless the limit curve is a straight segment. As an application, we obtain smooth stability results for minimizers with respect to clamped boundary data.

偏微分方程分析 · 数学 2025-11-19 Tatsuya Miura

Work of D. Stern and Bray-Kazaras-Khuri-Stern provide differential-geometric identities which relate the scalar curvature of Riemannian 3-manifolds to global invariants in terms of harmonic functions. These quantitative formulas are useful…

微分几何 · 数学 2022-10-11 Brian Allen , Edward Bryden , Demetre Kazaras

We derive integral and sup-estimates for the curvature of stably marginally outer trapped surfaces in a sliced space-time. The estimates bound the shear of a marginally outer trapped surface in terms of the intrinsic and extrinsic curvature…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Lars Andersson , Jan Metzger

The algebraic stability theorem for $\mathbb{R}$-persistence modules is a fundamental result in topological data analysis. We present a stability theorem for $n$-dimensional rectangle decomposable persistence modules up to a constant…

代数拓扑 · 数学 2020-01-22 Håvard Bakke Bjerkevik

A comparison theorem for the isoperimetric profile on the universal cover of surfaces evolving by normalised Ricci flow is proven. For any initial metric, a model comparison is constructed that initially lies below the profile of the…

微分几何 · 数学 2014-04-24 Paul Bryan

We study stationary hollow vortices with surface tension in two dimensions. Such objects solve an overdetermined elliptic free boundary problem in an exterior domain, with an additional boundary condition involving mean curvature and the…

偏微分方程分析 · 数学 2026-05-14 Lukas Niebel

In this paper the notion of modular cone metric space is introduced and some properties of such spaces are investigated. Also we define convex modular cone metric which takes values in CR(Y) where Y is a compact Hausdorff space. Then a…

泛函分析 · 数学 2013-10-15 Saeedeh Shamsi Gamchi , Mohammad Janfada , Asadollah Niknam

Considering the Teichm\"uller space of a surface equipped with Thurston's Lipschitz metric, we study geodesic segments whose endpoints have bounded combinatorics. We show that these geodesics are cobounded, and that the closest-point…

几何拓扑 · 数学 2011-09-15 Anna Lenzhen , Kasra Rafi , Jing Tao

This article explores several fundamental aspects of fuzzy $\mathscr{F}$-metric spaces and their applications in mathematical analysis. We investigate some essential properties concerning compactness and total boundedness in fuzzy…

综合数学 · 数学 2026-05-29 Dipti Barman , Abhishikta Das , T. Bag

We study the boundary rigidity problem for compact Riemannian manifolds with boundary $(M,g)$: is the Riemannian metric $g$ uniquely determined, up to an action of diffeomorphism fixing the boundary, by the distance function $\rho_g(x,y)$…

微分几何 · 数学 2007-05-23 Plamen Stefanov , Gunther Uhlmann

The goal of this paper is to investigate some rigidity properties of stable solutions of elliptic equations set on manifolds with boundary. We provide several types of results, according to the dimension of the manifold and the sign of its…

偏微分方程分析 · 数学 2009-07-16 Yannick Sire , Enrico Valdinoci