Intersecting random graphs and networks with multiple adjacency constraints: A simple example

Details Intersecting random graphs and networks with multiple adjacency constraints: A simple example Intersecting random graphs and networks with multiple adjacency constraints: A simple example

2008-09-04

arxiv.org/abs/0809.0918v1

Computer Science

Information Theory

Submitted to IEEE JSAC issue on Stochastic Geometry and Random Graphs for Wireless Networks

Scientific paper

When studying networks using random graph models, one is sometimes faced with situations where the notion of adjacency between nodes reflects multiple constraints. Traditional random graph models are insufficient to handle such situations. A simple idea to account for multiple constraints consists in taking the intersection of random graphs. In this paper we initiate the study of random graphs so obtained through a simple example. We examine the intersection of an Erdos-Renyi graph and of one-dimensional geometric random graphs. We investigate the zero-one laws for the property that there are no isolated nodes. When the geometric component is defined on the unit circle, a full zero-one law is established and we determine its critical scaling. When the geometric component lies in the unit interval, there is a gap in that the obtained zero and one laws are found to express deviations from different critical scalings. In particular, the first moment method requires a larger critical scaling than in the unit circle case in order to obtain the one law. This discrepancy is somewhat surprising given that the zero-one laws for the absence of isolated nodes are identical in the geometric random graphs on both the unit interval and unit circle.

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