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Detecting global bridges in networks

Pablo Jensen 1, 2, 3 Matteo Morini 1, 4, 5 Márton Karsai 1, 4, 5 Tommaso Venturini 6 Alessandro Vespignani 7, 8 Mathieu Jacomy 6 Jean-Philippe Cointet 9, 10 Pierre Mercklé 1, 11 Eric Fleury 4, 2, 5
1 ENS Lyon - École normale supérieure - Lyon
2 IXXI - Institut Rhône-Alpin des systèmes complexes
3 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
4 LIP - Laboratoire de l'Informatique du Parallélisme
5 DANTE - Dynamic Networks : Temporal and Structural Capture Approach
Inria Grenoble - Rhône-Alpes, LIP - Laboratoire de l'Informatique du Parallélisme, IXXI - Institut Rhône-Alpin des systèmes complexes
6 Médialab - Médialab (Sciences Po)
7 MoBS - Laboratory for the Modeling of Biological and Socio-technical Systems [Boston]
8 Institute for Scientific Interchange (ISI) Foundation
9 INRA-SenS - Science en Société
10 UPE - Université Paris-Est
11 CMW - Centre Max Weber
Abstract : The identification of nodes occupying important positions in a network structure is crucial for the understanding of the associated real-world system. Usually, betweenness centrality is used to evaluate a node capacity to connect different graph regions. However, we argue here that this measure is not adapted for that task, as it gives equal weight to “local” centers (i.e. nodes of high degree central to a single region) and to “global” bridges, which connect different communities. This distinction is important as the roles of such nodes are different in terms of the local and global organisation of the network structure. In this paper we propose a decomposition of betweenness centrality into two terms, one highlighting the local contributions and the other the global ones. We call the latter bridgeness centrality and show that it is capable to specifically spot out global bridges. In addition, we introduce an effective algorithmic implementation of this measure and demonstrate its capability to identify global bridges in air transportation and scientific collaboration networks
Keywords : Betweenness Centrality Bridgeness Centrality Centrality Measures
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https://hal.inria.fr/hal-01206166
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Submitted on : Thursday, October 1, 2015 - 1:31:15 PM
Last modification on : Friday, November 6, 2020 - 3:51:51 AM
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Pablo Jensen, Matteo Morini, Márton Karsai, Tommaso Venturini, Alessandro Vespignani, et al.. Detecting global bridges in networks. Journal of Complex Networks, Oxford University Press, 2015, 4 (3), pp.319-329. ⟨10.1093/comnet/cnv022⟩. ⟨hal-01206166⟩

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