Abstract
In the classical preferential attachment model, links form instantly to newly arriving nodes and do not change over time. We propose a hierarchical random graph model in a spatial setting, where such a time-variability arises from an activity-based reinforcement mechanism. We show that the reinforcement mechanism converges, and prove rigorously that the resulting random graph exhibits the small-world property. A further motivation for this random graph stems from modeling synaptic plasticity.
This work is supported by The Danish Council for Independent Research—Natural Sciences, grant DFF – 7014-00074 Statistics for point processes in space and beyond, and by the Centre for Stochastic Geometry and Advanced Bioimaging, funded by grant 8721 from the Villum Foundation.
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Acknowledgments
The authors thank all anonymous referees. We also thank C. Leibold for interesting discussions on the neuro-scientific background of synaptic plasticity and comments on an earlier version of the manuscript.
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Heydenreich, M., Hirsch, C. (2019). A Spatial Small-World Graph Arising from Activity-Based Reinforcement. In: Avrachenkov, K., Prałat, P., Ye, N. (eds) Algorithms and Models for the Web Graph. WAW 2019. Lecture Notes in Computer Science(), vol 11631. Springer, Cham. https://doi.org/10.1007/978-3-030-25070-6_8
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