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Information Theory of Complex Networks: On Evolution and Architectural Constraints

  • Ricard V. Solé
  • Sergi Valverde
Part I Network Structure
Part of the Lecture Notes in Physics book series (LNP, volume 650)

Abstract

Complex networks are characterized by highly heterogeneous distributions of links, often pervading the presence of key properties such as robustness under node removal. Several correlation measures have been defined in order to characterize the structure of these nets. Here we show that mutual information, noise and joint entropies can be properly defined on a static graph. These measures are computed for a number of real networks and analytically estimated for some simple standard models. It is shown that real networks are clustered in a well-defined domain of the entropy-noise space. By using simulated annealing optimization, it is shown that optimally heterogeneous nets actually cluster around the same narrow domain, suggesting that strong constraints actually operate on the possible universe of complex networks. The evolutionary implications are discussed.

Keywords

Mutual Information Complex Network Metabolic Network Degree Distribution Electronic Circuit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Authors and Affiliations

  • Ricard V. Solé
    • 1
  • Sergi Valverde
    • 1
  1. 1.Complex Systems Lab-ICREA, Universitat Pompeu Fabra (GRIB), Dr Aiguader 80, 08003 BarcelonaSpain

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