Results 21 to 30 of about 363,583 (199)

A sharp reverse Bonnesen-style inequality and generalization

open access: yesJournal of Inequalities and Applications, 2019
We investigate the isoperimetric deficit of the oval domain in the Euclidean plane. Via the kinematic formulae of Poincaré and Blaschke, and Blaschke’s rolling theorem, we obtain a sharp reverse Bonnesen-style inequality for a plane oval domain, which ...
Pengfu Wang
doaj   +1 more source

Exact bounds for tail probabilities of martingales with bounded differences

open access: yesLietuvos Matematikos Rinkinys, 2009
We consider random walks, say Wn = {0, M1, . . ., Mn} of length n starting at 0 and based on a martingale sequence Mk = X1 + ··· + Xk with differences Xm. Assuming |Xk| \leq 1 we solve the isoperimetric problem Bn(x) = supP\{Wn visits an interval [x,∞
Dainius Dzindzalieta
doaj   +1 more source

Isoperimetric inequalities of the fourth order Neumann eigenvalues

open access: yesJournal of Inequalities and Applications, 2020
In this paper, we obtain some isoperimetric inequalities for the first ( n − 1 ) $(n-1)$ eigenvalues of the fourth order Neumann Laplacian on bounded domains in an n-dimensional Euclidean space. Our result supports strongly the conjecture of Chasman.
Yanlin Deng, Feng Du
doaj   +1 more source

Randomized Isoperimetric Inequalities [PDF]

open access: yes, 2017
We discuss isoperimetric inequalities for convex sets. These include the classical isoperimetric inequality and that of Brunn-Minkowski, Blaschke-Santalo, Busemann-Petty and their various extensions. We show that many such inequalities admit stronger randomized forms in the following sense: for natural families of associated random convex sets one has ...
Paouris, Grigoris, Pivovarov, Peter
openaire   +2 more sources

An Isoperimetric Inequality for Planar Triangulations [PDF]

open access: yesDiscrete & Computational Geometry, 2017
We prove a discrete analogue to a classical isoperimetric theorem of Weil for surfaces with non-positive curvature. It is shown that hexagons in the triangular lattice have maximal volume among all sets of a given boundary in any triangulation with minimal degree 6.
Omer Angel, Itai Benjamini, Nizan Horesh
openaire   +3 more sources

Isoperimetric inequalities for some nonlinear eigenvalue problems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2004
In this paper we intend to review many of the known inequalities for eigenvalues of the Laplacian in Euclidean plane. Our aim is to show that we can generalize some results for the pseudo-Laplacian.
Gabriella Bognár
doaj   +1 more source

On Isoperimetric Inequalities in Minkowski Spaces

open access: yesJournal of Inequalities and Applications, 2010
The purpose of this expository paper is to collect some (mainly recent) inequalities, conjectures, and open questions closely related to isoperimetric problems in real, finite-dimensional Banach spaces (= Minkowski spaces).
Mustafaev Zokhrab, Martini Horst
doaj   +2 more sources

Compressions and isoperimetric inequalities

open access: yesJournal of Combinatorial Theory, Series A, 1991
Let \(G=(V,E)\) be a graph. For \(A\subset V\) and \(y\in V\), set \(D(A,y)=\inf \{d(x,y):\) \(x\in A\}\), where d is the usual graph metric. For \(t=0,1,2,...\), \(A_{(t)}=\{y\in V:\) d(A,y)\(\leq t\}\) is the t-boundary of A and \(A_{(1)}=\partial A\) is the boundary of A.
Béla Bollobás, Imre Leader
openaire   +3 more sources

Edge-Isoperimetric Inequalities and Influences [PDF]

open access: yesCombinatorics, Probability and Computing, 2007
We give a combinatorial proof of the result of Kahn, Kalai and Linial [16], which states that every balanced boolean function on the n-dimensional boolean cube has a variable with influence of at least $\Omega\bigl(\frac{\log n}{n}\bigr)$ .
Dvir Falik, Alex Samorodnitsky
openaire   +3 more sources

Dilation Type Inequalities for Strongly-Convex Sets in Weighted Riemannian Manifolds

open access: yesAnalysis and Geometry in Metric Spaces, 2021
In this paper, we consider a dilation type inequality on a weighted Riemannian manifold, which is classically known as Borell’s lemma in high-dimensional convex geometry.
Tsuji Hiroshi
doaj   +1 more source

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