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Recently, the theory of dense graph limits has received attention from multiple disciplines including graph theory, computer science, statistical physics, probability, statistics, and group theory. In this paper we initiate the study of the…

组合数学 · 数学 2015-03-09 Peter Diao , Dominique Guillot , Apoorva Khare , Bala Rajaratnam

The unions of directed graphs are the simplest examples of pushouts of directed graphs. The conditions under which they contravariantly induce surjective gauge-equivariant pullbacks of graph C*-algebras have been well studied and vastly…

环与代数 · 数学 2025-07-18 Piotr M. Hajac , Mariusz Tobolski

Given $p \in (0,1)$, we let $Q_p= Q_p^d$ be the random subgraph of the $d$-dimensional hypercube $Q^d$ where edges are present independently with probability $p$. It is well known that, as $d \rightarrow \infty$, if $p>\frac12$ then with…

组合数学 · 数学 2021-01-05 Colin McDiarmid , Alex Scott , Paul Withers

In here, I present a series of combinatorial equalities derived using a graph based approach. Different nodes in the graphs are visited following probabilistic dynamics of a moving dot. The results are presented in such a way that the…

组合数学 · 数学 2022-12-09 Jacques Bourg

In 2013, Bollob\'as, Mitsche, and Pralat at gave upper and lower bounds for the likely metric dimension of random Erd\H{o}s-R\'enyi graphs $G(n,p)$ for a large range of expected degrees $d=pn$. However, their results only apply when $d \ge…

组合数学 · 数学 2025-05-01 Josep Díaz , Harrison Hartle , Cristopher Moore

Motivated by low energy consumption in geographic routing in wireless networks, there has been recent interest in determining bounds on the length of edges in the Delaunay graph of randomly distributed points. Asymptotic results are known…

计算几何 · 计算机科学 2011-08-23 Esther M. Arkin , Antonio Fernandez Anta , Joseph S. B. Mitchell , Miguel A. Mosteiro

We consider compound geometric approximation for a nonnegative, integer-valued random variable $W$. The bound we give is straightforward but relies on having a lower bound on the failure rate of $W$. Applications are presented to M/G/1…

概率论 · 数学 2015-09-10 Fraser Daly

In this paper, we propose a class of Bayes estimators for the covariance matrix of graphical Gaussian models Markov with respect to a decomposable graph $G$. Working with the $W_{P_G}$ family defined by Letac and Massam [Ann. Statist. 35…

统计理论 · 数学 2009-01-22 Bala Rajaratnam , Hélène Massam , Carlos M. Carvalho

We prove that independent families of permutation invariant random matrices are asymptotically free over the diagonal, both in probability and in expectation, under a uniform boundedness assumption on the operator norm. We can relax the…

We develop a theory to measure the variance and covariance of probability distributions defined on the nodes of a graph, which takes into account the distance between nodes. Our approach generalizes the usual (co)variance to the setting of…

物理与社会 · 物理学 2021-08-19 Karel Devriendt , Samuel Martin-Gutierrez , Renaud Lambiotte

We consider random graphs sampled uniformly from a structured class of graphs, such as the class of graphs embeddable in a given surface. We sharpen and extend earlier results on pendant appearances, concerning for example numbers of…

组合数学 · 数学 2024-05-07 Colin McDiarmid

We study the probability that two directed polymers in the same random potential do not intersect. We use the replica method to map the problem onto the attractive Lieb-Liniger model with generalized statistics between particles. We obtain…

无序系统与神经网络 · 物理学 2016-05-03 Andrea De Luca , Pierre Le Doussal

We develop a new algorithmic technique that allows to transfer some constant time approximation algorithms for general graphs into random order streaming algorithms. We illustrate our technique by proving that in random order streams with…

数据结构与算法 · 计算机科学 2017-11-15 Pan Peng , Christian Sohler

Recently, variants of many classical extremal theorems have been proved in the random environment. We, complementing existing results, extend the Erd\H{o}s-Gallai Theorem in random graphs. In particular, we determine, up to a constant…

组合数学 · 数学 2020-01-15 József Balogh , Andrzej Dudek , Lina Li

We study graph $C^*$-algebras equipped with generalised gauge actions, and characterise in terms of groupoids and groupoid cocycles when two graph $C^*$-algebras are isomorphic by a diagonal-preserving isomorphism that intertwines the…

算子代数 · 数学 2018-10-08 Toke Meier Carlsen , James Rout

We follow up on previous work which found that commonly used graph evolution moves lead to conserved quantities that can be expressed in terms of the braiding of the graph in its embedding space. We study non-embedded graphs under three…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Fotini Markopoulou , Isabeau Prémont-Schwarz

We develop an analytic framework to understand fragmentation in turbulent, self-gravitating media. Previously, we showed some properties of turbulence can be predicted with the excursion-set formalism. Here, we generalize to fully…

宇宙学与河外天体物理 · 物理学 2013-07-02 Philip F. Hopkins

Within many real-world networks the links between pairs of nodes change over time. Thus, there has been a recent boom in studying temporal graphs. Recognizing patterns in temporal graphs requires a proximity measure to compare different…

机器学习 · 计算机科学 2020-07-07 Vincent Froese , Brijnesh Jain , Rolf Niedermeier , Malte Renken

We demonstrate how to generalize two of the most well-known random graph models, the classic random graph, and random graphs with a given degree distribution, by the introduction of hidden variables in the form of extra degrees of freedom,…

软凝聚态物质 · 物理学 2007-05-23 Bo Soderberg

The purpose of the present paper is to establish moment estimates of Rosenthal type for a rather general class of random variables satisfying certain bounds on the cumulants. We consider sequences of random variables which satisfy a central…

概率论 · 数学 2019-01-16 Peter Eichelsbacher , Lukas Knichel