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A polynomial-time exact algorithm for counting the number of directed acyclic graphs in a Markov equivalence class was recently given by Wien\"obst, Bannach, and Li\'skiewicz (AAAI 2021). In this paper, we consider the more general problem…

数据结构与算法 · 计算机科学 2023-06-14 Vidya Sagar Sharma

Different directed acyclic graphs (DAGs) may be Markov equivalent in the sense that they entail the same conditional independence relations among the observed variables. Meek (1995) characterizes Markov equivalence classes for DAGs (with no…

统计方法学 · 统计学 2012-06-26 Jiji Zhang

In this paper, we obtain a sufficient condition for the existence of parity factors in a regular graph in terms of edge-connectivity. Moreover, we also show that our condition is sharp.

组合数学 · 数学 2011-10-17 Hongliang Lu

This note resolves an open problem asked by Bezrukov in the open problem session of IWOCA 2014. It shows an equivalence between regular graphs and graphs for which a sequence of invariants presents some symmetric property. We extend this…

离散数学 · 计算机科学 2016-01-21 Edouard Bonnet , Florian Sikora

Markov chains are convenient means of generating realizations of networks with a given (joint or otherwise) degree distribution, since they simply require a procedure for rewiring edges. The major challenge is to find the right number of…

社会与信息网络 · 计算机科学 2012-11-01 J. Ray , A. Pinar , C. Seshadhri

Acyclic directed mixed graphs, also known as semi-Markov models represent the conditional independence structure induced on an observed margin by a DAG model with latent variables. In this paper we present a factorization criterion for…

人工智能 · 计算机科学 2014-06-27 Thomas S. Richardson

Different directed acyclic graphs (DAGs) may be Markov equivalent in the sense that they entail the same conditional independence relations among the observed variables. Chickering (1995) provided a transformational characterization of…

人工智能 · 计算机科学 2012-07-09 Jiji Zhang , Peter L. Spirtes

Global Markov properties in mixed graphs are usually formulated in terms of the path-oriented m-separation or by use of augmented graphs (similar to moral graphs in the case of directed acyclic graphs). We provide an alternative…

统计方法学 · 统计学 2011-11-17 Michael Eichler

We consider topological Markov chains (also called Markov shifts) on countable graphs. We show that a transient graph can be extended to a recurrent graph of equal entropy which is either positive recurrent of null recurrent, and we give an…

动力系统 · 数学 2019-01-03 Sylvie Ruette

In causal inference on directed acyclic graphs, the orientation of edges is in general only recovered up to Markov equivalence classes. We study Markov equivalence classes of uniformly random directed acyclic graphs. Using a tower…

概率论 · 数学 2024-10-01 Dominik Schmid , Allan Sly

Strong typicality and the Markov lemma have been used in the proofs of several multiterminal source coding theorems. Since these two tools can be applied to finite alphabets only, the results proved by them are subject to the same…

信息论 · 计算机科学 2010-06-03 Siu-Wai Ho

We propose an extension of the Contextual Graph Markov Model, a deep and probabilistic machine learning model for graphs, to model the distribution of edge features. Our approach is architectural, as we introduce an additional Bayesian…

机器学习 · 计算机科学 2023-08-21 Daniele Atzeni , Federico Errica , Davide Bacciu , Alessio Micheli

Ordered sequences of univariate or multivariate regressions provide statistical models for analysing data from randomized, possibly sequential interventions, from cohort or multi-wave panel studies, but also from cross-sectional or…

统计方法学 · 统计学 2015-03-19 Nanny Wermuth , Kayvan Sadeghi

The theory of ``Markov-up'' processes is being developed. This is a new class of stochastic processes with ``partial'' markovian features; it could also be called ``one-sided Markov''. Such a behavior may be found in the real world and in…

概率论 · 数学 2024-07-01 D. O. Kalikaeva

Maximal ancestral graphs (MAGs) are used to encode conditional independence relations in DAG models with hidden variables. Different MAGs may represent the same set of conditional independences and are called Markov equivalent. This paper…

统计方法学 · 统计学 2012-07-09 Jin Tian

We present a new kind of structural Markov property for probabilistic laws on decomposable graphs, which allows the explicit control of interactions between cliques, so is capable of encoding some interesting structure. We prove the…

统计计算 · 统计学 2017-10-20 Peter J Green , Alun Thomas

Assessing the magnitude of cause-and-effect relations is one of the central challenges found throughout the empirical sciences. The problem of identification of causal effects is concerned with determining whether a causal effect can be…

人工智能 · 计算机科学 2018-12-18 Amin Jaber , Jiji Zhang , Elias Bareinboim

A general novel approach mapping discrete, combinatorial, graph-theoretic problems onto ``physical'' models - namely $n$ simplexes in $n-1$ dimensions - is applied to the graph equivalence problem. It is shown to solve this long standing…

统计力学 · 物理学 2007-05-23 Vladimir Gudkov , Shmuel Nussinov

We introduce Markov substitute processes, a new model at the crossroad of statistics and formal grammars, and prove its main property : Markov substitute processes with a given support form an exponential family.

机器学习 · 统计学 2016-03-28 Olivier Catoni , Thomas Mainguy

Symmetric independence relations are often studied using graphical representations. Ancestral graphs or acyclic directed mixed graphs with $m$-separation provide classes of symmetric graphical independence models that are closed under…

统计理论 · 数学 2020-09-14 Søren Wengel Mogensen , Niels Richard Hansen