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Zeitschriftenartikel zum Thema „Probability-Graphons“

Autor: Grafiati

Veröffentlicht am 14. Dezember 2024

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1

Ackerman, Nate, Cameron E. Freer, Younesse Kaddar, et al. "Probabilistic Programming Interfaces for Random Graphs: Markov Categories, Graphons, and Nominal Sets." Proceedings of the ACM on Programming Languages 8, POPL (2024): 1819–49. http://dx.doi.org/10.1145/3632903.

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We study semantic models of probabilistic programming languages over graphs, and establish a connection to graphons from graph theory and combinatorics. We show that every well-behaved equational theory for our graph probabilistic programming language corresponds to a graphon, and conversely, every graphon arises in this way. We provide three constructions for showing that every graphon arises from an equational theory. The first is an abstract construction, using Markov categories and monoidal indeterminates. The second and third are more concrete. The second is in terms of traditional measur

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McMillan, Audra, and Adam Smith. "When is non-trivial estimation possible for graphons and stochastic block models?‡." Information and Inference: A Journal of the IMA 7, no. 2 (2017): 169–81. http://dx.doi.org/10.1093/imaiai/iax010.

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Abstract Block graphons (also called stochastic block models) are an important and widely studied class of models for random networks. We provide a lower bound on the accuracy of estimators for block graphons with a large number of blocks. We show that, given only the number $k$ of blocks and an upper bound $\rho$ on the values (connection probabilities) of the graphon, every estimator incurs error ${\it{\Omega}}\left(\min\left(\rho, \sqrt{\frac{\rho k^2}{n^2}}\right)\right)$ in the $\delta_2$ metric with constant probability for at least some graphons. In particular, our bound rules out any n

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ZHAO, YUFEI. "On the Lower Tail Variational Problem for Random Graphs." Combinatorics, Probability and Computing 26, no. 2 (2016): 301–20. http://dx.doi.org/10.1017/s0963548316000262.

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We study the lower tail large deviation problem for subgraph counts in a random graph. Let XH denote the number of copies of H in an Erdős–Rényi random graph $\mathcal{G}(n,p)$. We are interested in estimating the lower tail probability $\mathbb{P}(X_H \le (1-\delta) \mathbb{E} X_H)$ for fixed 0 < δ < 1.Thanks to the results of Chatterjee, Dembo and Varadhan, this large deviation problem has been reduced to a natural variational problem over graphons, at least for p ≥ n−αH (and conjecturally for a larger range of p). We study this variational problem and provide a partial characterizatio

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Braides, Andrea, Paolo Cermelli та Simone Dovetta. "Γ-limit of the cut functional on dense graph sequences". ESAIM: Control, Optimisation and Calculus of Variations 26 (2020): 26. http://dx.doi.org/10.1051/cocv/2019029.

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A sequence of graphs with diverging number of nodes is a dense graph sequence if the number of edges grows approximately as for complete graphs. To each such sequence a function, called graphon, can be associated, which contains information about the asymptotic behavior of the sequence. Here we show that the problem of subdividing a large graph in communities with a minimal amount of cuts can be approached in terms of graphons and the Γ-limit of the cut functional, and discuss the resulting variational principles on some examples. Since the limit cut functional is naturally defined on Young me

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HATAMI, HAMED, and SERGUEI NORINE. "The Entropy of Random-Free Graphons and Properties." Combinatorics, Probability and Computing 22, no. 4 (2013): 517–26. http://dx.doi.org/10.1017/s0963548313000175.

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Every graphon defines a random graph on any given number n of vertices. It was known that the graphon is random-free if and only if the entropy of this random graph is subquadratic. We prove that for random-free graphons, this entropy can grow as fast as any subquadratic function. However, if the graphon belongs to the closure of a random-free hereditary graph property, then the entropy is O(n log n). We also give a simple construction of a non-step-function random-free graphon for which this entropy is linear, refuting a conjecture of Janson.

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Keliger, Dániel, Illés Horváth, and Bálint Takács. "Local-density dependent Markov processes on graphons with epidemiological applications." Stochastic Processes and their Applications 148 (June 2022): 324–52. http://dx.doi.org/10.1016/j.spa.2022.03.001.

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Backhausz, Ágnes, and Dávid Kunszenti-Kovács. "On the dense preferential attachment graph models and their graphon induced counterpart." Journal of Applied Probability 56, no. 2 (2019): 590–601. http://dx.doi.org/10.1017/jpr.2019.34.

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AbstractLetting ℳ denote the space of finite measures on ℕ, and μλ ∊ ℳ denote the Poisson distribution with parameter λ, the function W : [0, 1]2 → ℳ given by W(x, y) = μc log x log y is called the PAG graphon with density c. It is known that this is the limit, in the multigraph homomorphism sense, of the dense preferential attachment graph (PAG) model with edge density c. This graphon can then in turn be used to generate the so-called W-random graphs in a natural way, and similar constructions also work in the slightly more general context of the so-called PAGκ models. The aim of this paper i

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Backhausz, Ágnes, and Balázs Szegedy. "Action convergence of operators and graphs." Canadian Journal of Mathematics, September 17, 2020, 1–50. http://dx.doi.org/10.4153/s0008414x2000070x.

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Abstract We present a new approach to graph limit theory that unifies and generalizes the two most well-developed directions, namely dense graph limits (even the more general $L^p$ limits) and Benjamini–Schramm limits (even in the stronger local-global setting). We illustrate by examples that this new framework provides a rich limit theory with natural limit objects for graphs of intermediate density. Moreover, it provides a limit theory for bounded operators (called P-operators) of the form $L^\infty (\Omega )\to L^1(\Omega )$ for probability spaces $\Omega $ . We introduce a metric to compar

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Markering, Maarten. "The Large Deviation Principle for Inhomogeneous Erdős–Rényi Random Graphs." Journal of Theoretical Probability, June 14, 2022. http://dx.doi.org/10.1007/s10959-022-01181-1.

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AbstractConsider the inhomogeneous Erdős-Rényi random graph (ERRG) on n vertices for which each pair $$i,j\in \{1,\ldots ,n\}$$ i , j ∈ { 1 , … , n } , $$i\ne j,$$ i ≠ j , is connected independently by an edge with probability $$r_n(\frac{i-1}{n},\frac{j-1}{n})$$ r n ( i - 1 n , j - 1 n ) , where $$(r_n)_{n\in \mathbb {N}}$$ ( r n ) n ∈ N is a sequence of graphons converging to a reference graphonr. As a generalisation of the celebrated large deviation principle (LDP) for ERRGs by Chatterjee and Varadhan (Eur J Comb 32:1000–1017, 2011), Dhara and Sen (Large deviation for uniform graphs with gi

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Janssen, Jeannette, and Aaron Smith. "Reconstruction of line-embeddings of graphons." Electronic Journal of Statistics 16, no. 1 (2022). http://dx.doi.org/10.1214/21-ejs1940.

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Oh, Sewoong, Soumik Pal, Raghav Somani, and Raghavendra Tripathi. "Gradient Flows on Graphons: Existence, Convergence, Continuity Equations." Journal of Theoretical Probability, July 3, 2023. http://dx.doi.org/10.1007/s10959-023-01271-8.

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Abbe, Emmanuel, Shuangping Li, and Allan Sly. "Learning sparse graphons and the generalized Kesten–Stigum threshold." Annals of Statistics 51, no. 2 (2023). http://dx.doi.org/10.1214/23-aos2262.

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Lunde, Robert, and Purnamrita Sarkar. "Subsampling Sparse Graphons Under Minimal Assumptions." Biometrika, June 2, 2022. http://dx.doi.org/10.1093/biomet/asac032.

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Summary We study the properties of two subsampling procedures for networks, (vertex subsampling and p-subsampling), under the sparse graphon model. The consistency of network subsampling is demonstrated under the minimal assumptions of weak convergence of corresponding network statistics and an (expected) subsample size growing to infinity slower than the number of vertices in the network. Furthermore, under appropriate sparsity conditions, we derive limiting distributions for the nonzero eigenvalues of an adjacency matrix under the sparse graphon model. Our weak convergence result implies the

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Chatterjee, Anirban, and Rajat Subhra Hazra. "Spectral properties for the Laplacian of a generalized Wigner matrix." Random Matrices: Theory and Applications, October 14, 2021. http://dx.doi.org/10.1142/s2010326322500265.

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In this paper, we consider the spectrum of a Laplacian matrix, also known as Markov matrices where the entries of the matrix are independent but have a variance profile. Motivated by recent works on generalized Wigner matrices we assume that the variance profile gives rise to a sequence of graphons. Under the assumption that these graphons converge, we show that the limiting spectral distribution converges. We give an expression for the moments of the limiting measure in terms of graph homomorphisms. In some special cases, we identify the limit explicitly. We also study the spectral norm and d

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Bhattacharya, Bhaswar B., Anirban Chatterjee, and Svante Janson. "Fluctuations of subgraph counts in graphon based random graphs." Combinatorics, Probability and Computing, December 9, 2022, 1–37. http://dx.doi.org/10.1017/s0963548322000335.

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Abstract Given a graphon $W$ and a finite simple graph $H$ , with vertex set $V(H)$ , denote by $X_n(H, W)$ the number of copies of $H$ in a $W$ -random graph on $n$ vertices. The asymptotic distribution of $X_n(H, W)$ was recently obtained by Hladký, Pelekis, and Šileikis [17] in the case where $H$ is a clique. In this paper, we extend this result to any fixed graph $H$ . Towards this we introduce a notion of $H$ -regularity of graphons and show that if the graphon $W$ is not $H$ -regular, then $X_n(H, W)$ has Gaussian fluctuations with scaling $n^{|V(H)|-\frac{1}{2}}$ . On the other hand, if

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Bet, Gianmarco, Fabio Coppini, and Francesca Romana Nardi. "Weakly interacting oscillators on dense random graphs." Journal of Applied Probability, June 30, 2023, 1–24. http://dx.doi.org/10.1017/jpr.2023.34.

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Abstract We consider a class of weakly interacting particle systems of mean-field type. The interactions between the particles are encoded in a graph sequence, i.e. two particles are interacting if and only if they are connected in the underlying graph. We establish a law of large numbers for the empirical measure of the system that holds whenever the graph sequence is convergent to a graphon. The limit is the solution of a non-linear Fokker–Planck equation weighted by the (possibly random) graphon limit. In contrast with the existing literature, our analysis focuses on both deterministic and

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Blekherman, Grigoriy, Annie Raymond, and Fan Wei. "Undecidability of polynomial inequalities in weighted graph homomorphism densities." Forum of Mathematics, Sigma 12 (2024). http://dx.doi.org/10.1017/fms.2024.19.

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Abstract Many problems and conjectures in extremal combinatorics concern polynomial inequalities between homomorphism densities of graphs where we allow edges to have real weights. Using the theory of graph limits, we can equivalently evaluate polynomial expressions in homomorphism densities on kernels W, that is, symmetric, bounded and measurable functions W from $[0,1]^2 \to \mathbb {R}$ . In 2011, Hatami and Norin proved a fundamental result that it is undecidable to determine the validity of polynomial inequalities in homomorphism densities for graphons (i.e., the case where the range of W

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