Abstract
Superstar nodes to which a large proportion of nodes attach in the evolving graphs are considered. We attract results of the extreme value theory regarding sums and maxima of non-stationary random length sequences to predict the tail index of the PageRanks and Max-linear models as influence measures of superstar nodes. To this end, the graphs are divided into mutually weakly dependent communities. Maxima and sums of the PageRanks over communities are used as weakly independent block-data. Tail indices of the block-maxima and block-sums and hence, of the PageRanks and the Max-linear models are found to be close to the minimum tail index of series of representative nodes taken from the communities. The graph evolution is provided by a linear preferential attachment. The tail indices are estimated by data of simulated and real temporal graphs.
The reported study was funded by the Russian Science Foundation RSF, project number 22-21-00177 (recipient N.M. Markovich, conceptualization, methodology development, formal analysis, writing–original draft preparation; recipient M.S. Ryzhov, software, data validation).
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Notes
- 1.
The classification into the classes of communities is caused by the Loivan’s algorithm. The classification is not so explicit for evolving simulated graphs in Fig. 2 that might be due to stationary distributions of their in- and out-degrees.
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Markovich, N.M., Ryzhov, M.S. (2022). Estimation of the Tail Index of PageRanks in Random Graphs. In: Vishnevskiy, V.M., Samouylov, K.E., Kozyrev, D.V. (eds) Distributed Computer and Communication Networks: Control, Computation, Communications. DCCN 2022. Lecture Notes in Computer Science, vol 13766 . Springer, Cham. https://doi.org/10.1007/978-3-031-23207-7_7
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