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The sharp isoperimetric inequality for non-compact Riemannian manifolds with non-negative Ricci curvature and Euclidean volume growth has been obtained in increasing generality with different approaches in a number of contributions…

度量几何 · 数学 2024-08-08 Fabio Cavalletti , Davide Manini

We develop a probabilistic framework for large-scale dimension bounds in metric geometry, based on padded decompositions, randomized ball carving on net graphs, and the Lov\'asz Local Lemma. For metric measure spaces with volume doubling…

度量几何 · 数学 2026-05-18 Jing Yu , Xingyu Zhu

The classification of solutions of the static vacuum Einstein equations, on a given closed manifold or an asymptotically flat one, is a long-standing and much-studied problem. Solutions are characterized by a complete Riemannian…

广义相对论与量子宇宙学 · 物理学 2018-05-23 Gregory J Galloway , Eric Woolgar

In 1996, Huisken-Yau showed that every three-dimensional Riemannian manifold can be uniquely foliated near infinity by stable closed CMC-surfaces if it is asymptotically equal to the (spatial) Schwarzschild solution and has positive mass.…

偏微分方程分析 · 数学 2016-08-17 Christopher Nerz

It is shown - in Ashtekar's canonical framework of General Relativity - that spherically symmetric (Schwarzschild) gravity in 4 dimensional space-time constitutes a finite dimensional completely integrable system. Canonically conjugate…

广义相对论与量子宇宙学 · 物理学 2010-11-01 H. A. Kastrup , T. Thiemann

V-static metrics generalise the notion of static metrics, and stem from the work of Miao and Tam [arXiv:0807.2693], and Corvino, Eichmair and Miao [arXiv:1211.6168] on critical points of the volume functional over the space of compact…

微分几何 · 数学 2024-06-14 Stephen McCormick

This paper studies sharp and rigid isoperimetric comparison theorems and asymptotic isoperimetric properties for small and large volumes on $N$-dimensional ${\rm RCD}(K,N)$ spaces $(X,\mathsf{d},\mathscr{H}^N)$. Moreover, we obtain almost…

微分几何 · 数学 2023-10-10 Gioacchino Antonelli , Enrico Pasqualetto , Marco Pozzetta , Daniele Semola

Using the Chern-Gauss-Bonnet theorem, we establish a sharp inequality for the total Gauss-Kronecker curvature of convex hypersurfaces in Cartan-Hadamard manifolds $M^n$ with nullity index at least $n-3$. Consequently, the Euclidean…

微分几何 · 数学 2026-05-26 Mohammad Ghomi

We are concerned with solutions to the parabolic Allen-Cahn equation in Riemannian manifolds. For a general class of initial condition we show non positivity of the limiting energy discrepancy. This in turn allows to prove almost…

偏微分方程分析 · 数学 2013-08-05 Adriano Pisante , Fabio Punzo

It has been proposed that quantum complexity is dual to the volume of the extremal surface, the action of the Wheeler-DeWitt patch, and the spacetime volume of the patch. Recently, a generalized volume-complexity observable was formulated…

高能物理 - 理论 · 物理学 2023-11-27 Xuanhua Wang , Ran Li , Jin Wang

On a compact Riemannian manifold with boundary having positive mean curvature, a fundamental result of Shi and Tam states that, if the manifold has nonnegative scalar curvature and if the boundary is isometric to a strictly convex…

微分几何 · 数学 2017-05-23 Siyuan Lu , Pengzi Miao

Almost-isometries are quasi-isometries with multiplicative constant one. Lifting a pair of metrics on a compact space gives quasi-isometric metrics on the universal cover. Under some additional hypotheses on the metrics, we show that there…

群论 · 数学 2016-07-19 Aditi Kar , Jean-Francois Lafont , Benjamin Schmidt

The equivalence principle in combination with the special relativistic equivalence between mass and energy, $E=mc^2$, is one of the cornerstones of general relativity. However, for composite systems a long-standing result in general…

广义相对论与量子宇宙学 · 物理学 2019-05-22 Magdalena Zych , Łukasz Rudnicki , Igor Pikovski

In this article we want to argue that an appropriate generalization of the Wigner concepts may lead to an asymptotic particle with well-defined mass, although no mass hyperboloid in the energy-momentum spectrum exists.

数学物理 · 物理学 2013-04-16 Andrzej Herdegen

Substatic Riemannian manifolds with minimal boundary arise naturally in General Relativity as spatial slices of static spacetimes satisfying the Null Energy Condition. Moreover, they constitute a vast generalization of nonnegative Ricci…

微分几何 · 数学 2023-07-28 Stefano Borghini , Mattia Fogagnolo

In this study, we employ eth-operators and spin-weighted spherical harmonics to express the ADM mass of a static space-time based on the mean values of its components over a a radius-$r$ sphere. While initially derived for standard…

广义相对论与量子宇宙学 · 物理学 2024-03-19 Leon Escobar-Diaz , Chris Stevens

Let $M$ be a Riemannian manifold with dimension greater or equal to $3$ which admits a complete, finite-volume Riemannian metric $g_0$ locally isometric to a rank-1 symmetric space of non-compact type. The volume entropy rigidity theorem…

微分几何 · 数学 2022-03-29 Yuping Ruan

Asymmetric dark matter (ADM) is motivated by the similar cosmological mass densities measured for ordinary and dark matter. We present a comprehensive theory for ADM that addresses the mass density similarity, going beyond the usual ADM…

高能物理 - 唯象学 · 物理学 2018-05-23 Stephen J. Lonsdale , Raymond R. Volkas

We consider an asymptotically flat Lorentzian manifold of dimension (1,3). An inequality is derived which bounds the Riemannian curvature tensor in terms of the ADM energy in the general case with second fundamental form. The inequality…

微分几何 · 数学 2014-01-28 Felix Finster , Margarita Kraus

We express the $q$-th Gauss-Bonnet-Chern mass of an immersed submanifold of Euclidean space as a linear combination of two terms: the total $(2q)$-th mean curvature and the integral, over the entire manifold, of the inner product between…

微分几何 · 数学 2025-03-19 Alexandre de Sousa , Frederico Girão