Classes of complex networks defined by role-to-role connectivity profiles

Details Classes of complex networks defined by role-to-role connectivity profiles Classes of complex networks defined by role-to-role connectivity profiles

2007-01-12

arxiv.org/abs/physics/0701149v1

Nature Physics 3, 63-69 (2007)

Physics

Data Analysis, Statistics and Probability

Scientific paper

10.1038/nphys489

Interactions between units in phyical, biological, technological, and social systems usually give rise to intrincate networks with non-trivial structure, which critically affects the dynamics and properties of the system. The focus of most current research on complex networks is on global network properties. A caveat of this approach is that the relevance of global properties hinges on the premise that networks are homogeneous, whereas most real-world networks have a markedly modular structure. Here, we report that networks with different functions, including the Internet, metabolic, air transportation, and protein interaction networks, have distinct patterns of connections among nodes with different roles, and that, as a consequence, complex networks can be classified into two distinct functional classes based on their link type frequency. Importantly, we demonstrate that the above structural features cannot be captured by means of often studied global properties.

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