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Recently, so-called treebased phylogenetic networks have gained considerable interest in the literature, where a treebased network is a network that can be constructed from a phylogenetic tree, called the base tree, by adding additional…

种群与进化 · 定量生物学 2019-11-28 Mareike Fischer , Michelle Galla , Lina Herbst , Yangjing Long , Kristina Wicke

We describe the structure of connected graphs with the minimum and maximum average distance, radius, diameter, betweenness centrality, efficiency and resistance distance, given their order and size. We find tight bounds on these graph…

分子网络 · 定量生物学 2011-05-02 Dionysios Barmpoutis , Richard M. Murray

Dense networks with weighted connections often exhibit a community like structure, where although most nodes are connected to each other, different patterns of edge weights may emerge depending on each node's community membership. We…

机器学习 · 统计学 2021-05-27 Benjamin Leinwand , Vladas Pipiras

Many natural, technological, and social systems incorporate multiway interactions, yet are characterized and measured on the basis of weighted pairwise interactions. In this article, I propose a family of models in which pairwise…

物理与社会 · 物理学 2013-06-17 Eduardo López

Analytical results are derived for the bond percolation threshold and the size of the giant connected component in a class of random networks with non-zero clustering. The network's degree distribution and clustering spectrum may be…

统计力学 · 物理学 2009-09-22 James P. Gleeson

In this paper, we give an analytic solution for graphs with n nodes and E edges for which the probability of obtaining a given graph G is specified in terms of the degree sequence of G. We describe how this model naturally appears in the…

概率论 · 数学 2008-10-20 M. Draief , A. Ganesh , L. Massoulie

Modeling networks can serve as a means of summarizing high-dimensional complex systems. Adapting an approach devised for dense, weighted networks, we propose a new method for generating and estimating unweighted networks. This approach can…

物理与社会 · 物理学 2024-04-12 Benjamin Leinwand , Vince Lyzinski

We study connected graphs with a fixed degree sequence, in the sparse setting where the number of edges grows linearly in the number of vertices. Using the relation to the configuration model, we identify the number of such connected graphs…

组合数学 · 数学 2026-05-11 Sasha Bell , Serte Donderwinkel , Remco van der Hofstad

Many machine learning algorithms are based on the assumption that training examples are drawn independently. However, this assumption does not hold anymore when learning from a networked sample where two or more training examples may share…

机器学习 · 计算机科学 2017-02-21 Yuyi Wang , Jan Ramon , Zheng-Chu Guo

Across the sciences, the statistical analysis of networks is central to the production of knowledge on relational phenomena. Because of their ability to model the structural generation of networks, exponential random graph models are a…

数据分析、统计与概率 · 物理学 2015-05-27 Bruce A. Desmarais , Skyler J. Cranmer

Networks are widely used to model the contact structure within a population and in the resulting models of disease spread. While networks provide a high degree of realism, the analysis of the exact model is out of reach and even numerical…

定量方法 · 定量生物学 2019-09-15 Nicos Georgiou , IstvÁn Z. Kiss , PÉter Simon

A version of ``preferential attachment'' random graphs, corresponding to linear ``weights'' with random ``edge additions,'' which generalizes some previously considered models, is studied. This graph model is embedded in a continuous-time…

概率论 · 数学 2007-05-23 K. B. Athreya , A. P. Ghosh , S. Sethuraman

We prove a central limit theorem for a certain class of functions on sparse rank-one inhomogeneous random graphs endowed with additional i.i.d. edge and vertex weights. Our proof of the central limit theorem uses a perturbative form of…

概率论 · 数学 2024-04-22 Anja Sturm , Moritz Wemheuer

For many complex networks present in nature only a single instance, usually of large size, is available. Any measurement made on this single instance cannot be repeated on different realizations. In order to detect significant patterns in a…

We study an extension of Duncan Watts' 2002 model of information cascades in social networks where edge weights are taken to be random, an innovation motivated by recent applications of cascade analysis to systemic risk in financial…

物理与社会 · 物理学 2012-11-27 T. R. Hurd , James P. Gleeson

Understanding spreading dynamics will benefit society as a whole in better preventing and controlling diseases, as well as facilitating the socially responsible information while depressing destructive rumors. In network-based spreading…

物理与社会 · 物理学 2015-01-16 Ai-Xiang Cui , Zimo Yang , Tao Zhou

We review the behavior of epidemic spreading on complex networks in which there are explicit correlations among the degrees of connected vertices.

统计力学 · 物理学 2015-06-24 Marian Boguna , Romualdo Pastor-Satorras , Alessandro Vespignani

In many studies, it is common to use binary (i.e., unweighted) edges to examine networks of entities that are either adjacent or not adjacent. Researchers have generalized such binary networks to incorporate edge weights, which allow one to…

物理与社会 · 物理学 2024-02-29 Lucas Böttcher , Mason A. Porter

We study a variant of the standard random intersection graph model ($G(n,m,F,H)$) in which random weights are assigned to both vertex types in the bipartite structure. Under certain assumptions on the distributions of these weights, the…

组合数学 · 数学 2010-03-10 Yilun Shang

We study a generalisation of the random recursive tree (RRT) model and its multigraph counterpart, the uniform directed acyclic graph (DAG). Here, vertices are equipped with a random vertex-weight representing initial inhomogeneities in the…

概率论 · 数学 2023-12-29 Bas Lodewijks , Marcel Ortgiese