title: Complex networks created by aggregation.
abstract: We study aggregation as a mechanism for the creation of complex networks. In this evolution process vertices merge together, which increases a number of highly connected hubs. We study a range of complex network architectures produced by the aggregation. Fat-tailed (in particular, scale-free) distributions of connections are obtained for both networks with a finite number of vertices and growing networks. We observe a strong variation of a network structure with growing density of connections and find the phase transition of the condensation of edges. Finally, we demonstrate the importance of structural correlations in these networks.
authors.affiliation: Helsinki University of Technology, Laboratory of Physics, HUT-02105 Finland. Mikko.Alava@hut.fi
authors.forename: M J
authors.initials: MJ
authors.lastname: Alava
authors.forename: S N
authors.initials: SN
authors.lastname: Dorogovtsev