Models and average properties of scale-free directed networks

Details Models and average properties of scale-free directed networks Models and average properties of scale-free directed networks

2006-08-30

arxiv.org/abs/cond-mat/0608659v1

Phys. Rev. E 74, 026104 (2006)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 8 figures

Scientific paper

10.1103/PhysRevE.74.026104

We extend the merging model for undirected networks by Kim et al. [Eur. Phys. J. B 43, 369 (2004)] to directed networks and investigate the emerging scale-free networks. Two versions of the directed merging model, friendly and hostile merging, give rise to two distinct network types. We uncover that some non-trivial features of these two network types resemble two levels of a certain randomization/non-specificity in the link reshuffling during network evolution. Furthermore the same features show up, respectively, in metabolic networks and transcriptional networks. We introduce measures that single out the distinguishing features between the two prototype networks, as well as point out features which are beyond the prototypes.

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