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http://dx.doi.org/10.9708/jksci.2016.21.1.025

Analysis of Effect of an Additional Edge on Eigenvector Centrality of Graph  

Han, Chi-Geun (Dept. of Computer Science, Kyung Hee University)
Lee, Sang-Hoon (Dept. of Computer Science, Kyung Hee University)
Abstract
There are many methods to describe the importance of a node, centrality, in a graph. In this paper, we focus on the eigenvector centrality. In this paper, an analytical method to estimate the difference of centrality with an additional edge in a graph is proposed. In order to validate the analytical method to estimate the centrality, two problems, to decide an additional edge that maximizes the difference of all centralities of all nodes in the graph and to decide an additional edge that maximizes the centrality of a specific node, are solved using three kinds of random graphs and the results of the estimated edge and observed edge are compared. Though the estimated centrality difference is slightly different from the observed real centrality in some cases, it is shown that the proposed method is effective to estimate the centrality difference with a short running time.
Keywords
graph; eigenvector centrality;
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Times Cited By KSCI : 2  (Citation Analysis)
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