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Robust Analysis of Preferential Attachment Models with Fitness

Published online by Cambridge University Press:  24 February 2014

STEFFEN DEREICH  and
MARCEL ORTGIESE
STEFFEN DEREICH
Affiliation:
Institut für Mathematische Statistik, Westf. Wilhelms-Universität Münster, Einsteinstraße 62, 48149 Münster, Germany (e-mail: Steffen.Dereich@wwu.de)
MARCEL ORTGIESE
Affiliation:
Institut für Mathematische Statistik, Westf. Wilhelms-Universität Münster, Einsteinstraße 62, 48149 Münster, Germany (e-mail: Steffen.Dereich@wwu.de)
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Abstract

The preferential attachment network with fitness is a dynamic random graph model. New vertices are introduced consecutively and a new vertex is attached to an old vertex with probability proportional to the degree of the old one multiplied by a random fitness. We concentrate on the typical behaviour of the graph by calculating the fitness distribution of a vertex chosen proportional to its degree. For a particular variant of the model, this analysis was first carried out by Borgs, Chayes, Daskalakis and Roch. However, we present a new method, which is robust in the sense that it does not depend on the exact specification of the attachment law. In particular, we show that a peculiar phenomenon, referred to as Bose–Einstein condensation, can be observed in a wide variety of models. Finally, we also compute the joint degree and fitness distribution of a uniformly chosen vertex.

Keywords

Primary 05C80Secondary 60G4290B15

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Type
Paper
Information
Combinatorics, Probability and Computing , Volume 23 , Issue 3 , May 2014 , pp. 386 - 411
Copyright
Copyright © Cambridge University Press 2014 

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