A scale-free network with limiting on vertices

Lian Tang and Bin Wang

Physica A: Statistical Mechanics and its Applications, 2010, vol. 389, issue 10, 2147-2154

Abstract: We propose and analyze a random graph model which explains a phenomena in the economic company network in which company may not expand its business at some time due to the limiting of money and capacity. The random graph process is defined as follows: at any time-step t, (i) with probability α(k) and independently of other time-step, each vertex vi(i≤t−1) is inactive which means it cannot be connected by more edges, where k is the degree of vi at the time-step t; (ii) a new vertex vt is added along with m edges incident with vt at one time and its neighbors are chosen in the manner of preferential attachment. We prove that the degree distribution P(k) of this random graph process satisfies P(k)∝C1k−3−α01−α0 if α(⋅) is a constant α0; and P(k)∝C2k−3 if α(ℓ)↓0 as ℓ↑∞, where C1,C2 are two positive constants. The analytical result is found to be in good agreement with that obtained by numerical simulations. Furthermore, we get the degree distributions in this model with m-varying functions by simulation.

Keywords: Scale-free; Random graph process; Inactive (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:389:y:2010:i:10:p:2147-2154

DOI: 10.1016/j.physa.2010.01.036

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