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research article
Metastable densities for the contact process on power law random graphs
We consider the contact process on a random graph with a fixed degree distribution given by a power law. We follow the work of Chatterjee and Durrett [2], who showed that for arbitrarily small infection parameter lambda, the survival time of the process is larger than a stretched exponential function of the number of vertices. For lambda close to 0 (that is, "near criticality"), we obtain sharp bounds for the typical density of infected sites in the graph, as the number of vertices tends to infinity. We exhibit three different regimes for this density, depending on the tail of the degree law.
Type
research article
Web of Science ID
WOS:000328081700001
Authors
Publication date
2013
Publisher
Published in
Volume
18
Start page
1
End page
36
Subjects
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
January 9, 2014
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