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It is known that many different types of finite random subgraph models undergo quantitatively similar phase transitions around their percolation thresholds, and the proofs of these results rely on isoperimetric properties of the underlying…

概率论 · 数学 2024-01-23 Sahar Diskin , Joshua Erde , Mihyun Kang , Michael Krivelevich

We prove a vertex isoperimetric inequality for the $n$-dimensional Hamming ball $\mathcal{B}_n(R)$ of radius $R$. The isoperimetric inequality is sharp up to a constant factor for sets that are comparable to $\mathcal{B}_n(R)$ in size. A…

组合数学 · 数学 2022-02-10 Zilin Jiang , Amir Yehudayoff

The Euclidean mixed isoperimetric-isodiametric inequality states that the round ball maximizes the volume under constraint on the product between boundary area and radius. The goal of the paper is to investigate such mixed…

偏微分方程分析 · 数学 2017-03-01 Andrea Mondino , Emanuele Spadaro

The direct product of graphs $G_1,\ldots,G_n$ is the graph with vertex set $V(G_1)\times\cdots\times V(G_n)$ in which two vertices $(g_1,\ldots,g_n)$ and $(g_1',\ldots,g_n')$ are adjacent if and only if $g_i$ is adjacent to $g_i'$ in $G_i$…

组合数学 · 数学 2019-04-05 Noga Alon , Colin Defant

We propose to study unweighted graphs of constant distance VC-dimension as a broad generalization of many graph classes for which we can compute the diameter in truly subquadratic-time. In particular for any fixed $H$, the class of…

数据结构与算法 · 计算机科学 2019-10-31 Guillaume Ducoffe , Michel Habib , Laurent Viennot

We study quantitative isoperimetric inequalities for two different perimeter-type functionals. We first consider classical capillarity functionals, which measure the perimeter of sets in a Euclidean half-space, assigning a constant weight…

微分几何 · 数学 2025-07-22 Davide Carazzato , Giulio Pascale , Marco Pozzetta

We study, on a weighted Riemannian manifold of Ric$_{N} \geq K > 0$ for $N < -1$, when equality holds in the isoperimetric inequality. Our main theorem asserts that such a manifold is necessarily isometric to the warped product $\mathbb{R}…

微分几何 · 数学 2019-01-03 Cong Hung Mai

By using optimal mass transport theory we prove a sharp isoperimetric inequality in ${\sf CD} (0,N)$ metric measure spaces assuming an asymptotic volume growth at infinity. Our result extends recently proven isoperimetric inequalities for…

微分几何 · 数学 2022-02-22 Zoltán M. Balogh , Alexandru Kristály

In this paper we study regularity and topological properties of volume constrained minimizers of quasi-perimeters in $\sf RCD$ spaces where the reference measure is the Hausdorff measure. A quasi-perimeter is a functional given by the sum…

微分几何 · 数学 2022-03-08 Gioacchino Antonelli , Enrico Pasqualetto , Marco Pozzetta

We study the isoperimetric problem in product spaces equipped with the uniform distance. Our main result is a characterization of isoperimetric inequalities which, when satisfied on a space, are still valid for the product spaces, up a to a…

泛函分析 · 数学 2014-11-14 Franck Barthe , Benoit Huou

For any closed orientable 3-manifold, there is a volume function defined on the space of all Seifert representations of the fundamental group. The maximum absolute value of this function agrees with the Seifert volume of the manifold due to…

几何拓扑 · 数学 2024-03-06 Pierre Derbez , Yi Liu , Shicheng Wang

We show that the Cheeger constant of compact surfaces is bounded by a function of the area. We apply this to isoperimetric profiles of bounded genus non-compact surfaces, to show that if their isoperimetric profile grows faster than $\sqrt…

微分几何 · 数学 2007-07-02 Panos Papasoglu

In this paper we prove the existence of isoperimetric regions of any volume in Riemannian manifolds with Ricci bounded below assuming Gromov--Hausdorff asymptoticity to the suitable simply connected model of constant sectional curvature.…

微分几何 · 数学 2022-09-07 Gioacchino Antonelli , Mattia Fogagnolo , Marco Pozzetta

We establish a quantitative isoperimetric inequality for weighted Riemannian manifolds with $\mathrm{Ric}_{\infty} \ge 1$. Precisely, we give an upper bound of the volume of the symmetric difference between a Borel set and a sub-level (or…

微分几何 · 数学 2022-02-08 Cong Hung Mai , Shin-ichi Ohta

In this short note, we establish an edge-isoperimetric inequality for arbitrary product graphs. Our inequality is sharp for subsets of many different sizes in every product graph. In particular, it implies that the $2^d$-element sets with…

组合数学 · 数学 2024-11-19 Sahar Diskin , Wojciech Samotij

In this paper we first prove some linear isoperimetric inequalities for submanifolds in the de Sitter-Schwarzschild and Reissner-Nordstrom manifolds. Moreover, the equality is attained. Next, we prove some monotonicity formulas for…

微分几何 · 数学 2019-03-08 Hilário Alencar , Gregório Silva Neto

We prove the following isoperimetric-type inequality: for every convex body $K$ in $\mathbb R^n$ and some $\sigma\subset[n]:=\{1,\dots,n\}$ there exists a suitable Hanner polytope $B_K$ with the same volume as $K$ and such that the volume…

度量几何 · 数学 2026-01-22 Luis J. Alías , Bernardo González Merino , Beatriz Marín Gimeno

The famous Minkowski inequality provides a sharp lower bound for the mixed volume $V(K,M[n-1])$ of two convex bodies $K,M\subset\mathbb{R}^n$ in terms of powers of the volumes of the individual bodies $K$ and $M$. The special case where $K$…

度量几何 · 数学 2020-12-04 Daniel Hug , Károly Böröczky

Linear rank-width is a graph width parameter, which is a variation of rank-width by restricting its tree to a caterpillar. As a corollary of known theorems, for each $k$, there is a finite obstruction set $\mathcal{O}_k$ of graphs such that…

组合数学 · 数学 2014-09-10 Jisu Jeong , O-joung Kwon , Sang-il Oum

We prove some isoperimetric type inequalities in warped product manifolds, or more generally, multiply warped product manifolds. We then relate them to inequalities involving the higher order mean-curvature integrals. We also apply our…

微分几何 · 数学 2017-08-23 Kwok-Kun Kwong