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    A general centrality framework based on node navigability

    De Meo, P. and Levene, Mark and Messina, F. and Provetti, Alessandro (2019) A general centrality framework based on node navigability. IEEE Transactions on Knowledge and Data Engineering , ISSN 1041-4347. (In Press)

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    Abstract

    Centrality metrics are a popular tool in Network Science to identify important nodes within a graph. We introduce the Potential Gain as a centrality measure that unifies many walk-based centrality metrics in graphs and captures the notion of node navigability, interpreted as the property of being reachable from anywhere else (in the graph) through short walks. Two instances of the Potential Gain (called the Geometric and the Exponential Potential Gain) are presented and we describe scalable algorithms for computing them on large graphs. We also give a proof of the relationship between the new measures and established centralities. The Geometric potential gain of a node can thus be characterized as the product of its Degree centrality by its Katz centrality scores. At the same time, the exponential potential gain of a node is proved to be the product of Degree centrality by its Communicability index. These formal results connect potential gain to both the "popularity" and "similarity" properties that are captured by the above centralities.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): Measurement, Navigation, Eigenvalues And Eigenfunctions, Task Analysis, Indexes, Social Networking Online, Computer Science, Centrality, Node Ranking In Graphs, Graph Navigability
    School: School of Business, Economics & Informatics > Computer Science and Information Systems
    Research Centres and Institutes: Data Analytics, Birkbeck Institute for
    Depositing User: Administrator
    Date Deposited: 03 Feb 2020 12:46
    Last Modified: 05 Dec 2020 12:20
    URI: https://eprints.bbk.ac.uk/id/eprint/30769

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