A critical constant for the κ-nearest-neighbour model

Abstract

Let P be a Poisson process of intensity 1 in a square Sn of area n. For a fixed integer k, join every point of P to its k nearest neighbours, creating an undirected random geometric graph Gn,k. We prove that there exists a critical constant ccrit such that, for c < ccrit, Gn,⌊clogn⌋ is disconnected with probability tending to 1 as n → 8 and, for c > ccrit, Gn,⌊clogn⌋ is connected with probability tending to 1 as n → 8. This answers a question posed in Balister et al. (2005). © Applied Probability Trust 2009.

Publication Title

Advances in Applied Probability

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