A remark on the BA model of scale-free networks

Details A remark on the BA model of scale-free networks A remark on the BA model of scale-free networks

2009-02-10

arxiv.org/abs/0902.1570v3

Physics

Physics and Society

4 pages, correction to previous versions

Scientific paper

The degree distributions of many real world networks follow power-laws whose exponents tend to fall between two and three. Within the framework of the Barabasi-Albert model (BA model), we explain this empirical observation by a simple fact. To that end we propose a modified BA model with one parameter that serves as a regulatory factor for the growth rate of added links in scale-free networks. The regulatory factor has something to do with the obvious fact that one link has two nodes. The modified model also allows to connect nodes by newly added links that do not necessarily emanate from new nodes. Another related model using the master equation is also given, from which the same power-law degree distribution can be derived.

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