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Local assortativity in weighted and directed complex networks

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  • Sabek, M.
  • Pigorsch, U.

Abstract

Assortativity, i.e. the tendency of a vertex to bond with another based on their similarity, such as degree, is an important network characteristic that is well-known to be relevant for the network’s robustness against attacks. Commonly it is analyzed on the global level, i.e. for the whole network. However, the local structure of assortativity is also of interest as it allows to assess which of the network’s vertices and edges are the most endangering or the most protective ones. Hence, it is quite important to analyze the contribution of individual vertices and edges to the network’s global assortativity. For unweighted networks Piraveenan et al. (2008; 2010) and Zhang et al. (2012) suggest two allegedly different approaches to measure local assortativity. In this paper we show their equivalence and propose generalized local assortativity measures that are also applicable to weighted (un)directed networks. They allow to analyze the assortative behavior of edges and vertices as well as of entire network components. We illustrate the usefulness of our measures based on theoretical and real-world weighted networks and propose new local assortativity profiles, which provide, inter alia, information about the pattern of local assortativity with respect to edge weight.

Suggested Citation

  • Sabek, M. & Pigorsch, U., 2023. "Local assortativity in weighted and directed complex networks," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 630(C).
    • Handle: RePEc:eee:phsmap:v:630:y:2023:i:c:s0378437123007860
    DOI: 10.1016/j.physa.2023.129231
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    References listed on IDEAS

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