eprintid: 1194 rev_number: 8 eprint_status: archive userid: 6 dir: disk0/00/00/11/94 datestamp: 2012-02-27 11:58:34 lastmod: 2012-02-27 11:58:34 status_changed: 2012-02-27 11:58:34 type: book_section metadata_visibility: show creators_name: Marchetti, Riccardo creators_name: Caldarelli, Guido creators_name: Pietronero, Luciano creators_id: creators_id: guido.caldarelli@imtlucca.it creators_id: title: The fractal properties of internet ispublished: pub subjects: QA75 subjects: QC divisions: EIC full_text_status: none keywords: PACS:89.75.Fb Structures and organization in complex systems; 89.20.Hh World Wide Web, Internet; 89.70.-a Information and communication theory note: Proceedings of the VI Granada Seminar on Computational Physics, 4-10 September 2000, Granada, Spain abstract: In this paper we show that the Internet web, from a user’s perspective, manifests robust scaling properties of the type P(n)∝n−r where n is the size of the basin connected to a given point, P represents the density of probability of finding a basin of size n connected and τ = 1.9±0.1 is a characteristic universal exponent. The connection between users and providers are studied and modeled as branches of a world spanning tree. This scale-free structure is the result of the spontaneous growth of the web, but is not necessarily the optimal one for efficient transport. We introduce an appropriate figure of merit and suggest that a planning of few big links, acting as information highways, may noticeably increase the efficiency of the net without affecting its robustness. date: 2001 date_type: published volume: 574 publisher: American Institute of Physics pagerange: 85-88 id_number: 10.1063/1.1386821 refereed: TRUE issn: 0094243X book_title: Modeling Complex Systems: sixth Granada lectures on computational physics editors_name: Garrido, Pietro L. editors_name: Marro, Joaquín official_url: http://dx.doi.org/10.1063/1.1386821 citation: Marchetti, Riccardo and Caldarelli, Guido and Pietronero, Luciano The fractal properties of internet. In: Modeling Complex Systems: sixth Granada lectures on computational physics. American Institute of Physics, pp. 85-88. (2001)