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First passage percolation on Erdős–Rényi graphs with general weights
Publikationstyp
Journal Article
Date Issued
2025-11-23
Sprache
English
Volume
35
Issue
6
Start Page
4213
End Page
4243
Citation
The Annals of Applied Probability 35 (6): 4213-4243 (2025)
Publisher DOI
Publisher
Institute of Mathematical Statistics
We consider first passage percolation on the Erdős–Rényi graph with n vertices in which each pair of distinct vertices is connected independently by an edge with probability λ/n for some λ>1. The edges of the graph are given nonnegative i.i.d. weights with a nondegenerate distribution such that the probability of zero is not too large. We consider the paths with small total weight between two distinct typical vertices and analyse the joint behaviour of the numbers of edges on such paths, the so-called hopcounts, and the total weights of these paths. For n→∞, we show that, after a suitable transformation, the pairs of hopcounts and total weights of these paths converge in distribution to a Cox process, that is, a Poisson process with a random intensity measure. The random intensity measure is controlled by two independent random variables, whose distribution is the solution of a distributional fixed point equation and is related to branching processes. For nonarithmetic and arithmetic edge-weight distributions we observe different behaviour. In particular, we derive the limiting distribution for the minimal total weight and the corresponding hopcount(s). Our results generalise earlier work of Bhamidi, van der Hofstad and Hooghiemstra, who assume that edge weights have an absolutely continuous distribution. The main tool we employ is the method of moments.
Subjects
central limit theorem
Cox process
Erdős–Rényi graph
first passage percolation
hopcount
Poisson process
total weight
DDC Class
510: Mathematics