The fractal properties of Internet
G. Caldarelli; R. Marchetti; L. Pietronero; G. Caldarelli; INFM Unità ROMA1 and Dipartimento di Fisica - Università di Roma "La Sapienza” P.le A. Moro 2, 00185 Roma, Italy; R. Marchetti; INFM Unità ROMA1 and Dipartimento di Fisica - Università di Roma "La Sapienza” P.le A. Moro 2, 00185 Roma, Italy; L. Pietronero; INFM Unità ROMA1 and Dipartimento di Fisica - Università di Roma "La Sapienza” P.le A. Moro 2, 00185 Roma, Italy
Журнал:
EPL (Europhysics Letters)
Дата:
2000-11-15
Аннотация:
In this paper we show that the Internet web, from a user's perspective, manifests robust scaling properties of the type P(n) ∝ n<sup>−τ</sup>, where n is the size of the basin connected to a given point, P represents the density of probability of finding n points downhill and τ = 1.9 ± 0.1 s a characteristic universal exponent. This scale-free structure is a 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.
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