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Kristoffer Spricer: The configuration model for partially directed graphs

Time: Wed 2015-02-18 15.15

Location: The Cramér room (room 306), building 6, Kräftriket, Department of mathematics, Stockholm university

Participating: Kristoffer Spricer, Stockholm university

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The configuration model was originally defined for undirected networks and has recently been extended to directed networks. Many empirical networks are however neither undirected nor completely directed, but instead usually partially directed meaning that certain edges are directed and others are undirected. In this talk a configuration model is defined for such networks where nodes have in-, out-, and undirected degrees that may be dependent. We prove conditions under which the resulting degree distributions converge to the intended degree distributions. The new model is shown to better approximate several empirical networks compared to undirected and completely directed networks. Some simulations showing what the convergence looks like for some finite sizes of the graph will also be presented.