title: Self-similarity of complex networks and hidden metric spaces.
abstract: We demonstrate that the self-similarity of some scale-free networks with respect to a simple degree-thresholding renormalization scheme finds a natural interpretation in the assumption that network nodes exist in hidden metric spaces. Clustering, i.e., cycles of length three, plays a crucial role in this framework as a topological reflection of the triangle inequality in the hidden geometry. We prove that a class of hidden variable models with underlying metric spaces are able to accurately reproduce the self-similarity properties that we measured in the real networks. Our findings indicate that hidden geometries underlying these real networks are a plausible explanation for their observed topologies and, in particular, for their self-similarity with respect to the degree-based renormalization.
authors: Institute of Theoretical Physics, LBS, SB, EPFL, 1015 Lausanne, Switzerland.
authors: M Angeles
authors: MA
authors: Serrano
authors: Dmitri
authors: D
authors: Krioukov
authors: Marián
authors: M
authors: Boguñá