Random networks with sublinear preferential attachment: the giant component

Steffen Dereich, Peter Morters

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42 Citations (SciVal)
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We study a dynamical random network model in which at every construction step a new vertex is introduced and attached to every existing vertex independently with a probability proportional to a concave function f of its current degree. We give a criterion for the existence of a giant component, which is both necessary and sufficient, and which becomes explicit when f is linear. Otherwise it allows the derivation of explicit necessary and sufficient conditions, which are often fairly close. We give an explicit criterion to decide whether the giant component is robust under random removal of edges. We also determine asymptotically the size of the giant component and the empirical distribution of component sizes in terms of the survival probability and size distribution of a multitype branching random walk associated with f.
Original languageEnglish
Pages (from-to)329-384
Number of pages56
JournalAnnals of Probability
Issue number1
Publication statusPublished - Jan 2013


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