Geodesics and almost geodesic cycles in random regular graphs
Metric Geometry
2007-05-23 v1 Probability
Abstract
A geodesic in a graph G is a shortest path between two vertices of G. For a specific function e(n) of n, we define an almost geodesic cycle C in G to be a cycle in which for every two vertices u and v in C, the distance d_G(u,v) is at least d_C(u,v)-e(n). Let f(n) be any function tending to infinity with n. We consider a random d-regular graph on n vertices. We show that almost all pairs of vertices belong to an almost geodesic cycle C with e(n)= \log_{d-1} \log_{d-1} n +f(n) and |C|=2\log_{d-1}n+O(f(n)). Along the way, we obtain results on near-geodesic paths. We also give the limiting distribution of the number of geodesics between two random vertices in this random graph.
Cite
@article{arxiv.math/0610089,
title = {Geodesics and almost geodesic cycles in random regular graphs},
author = {Itai Benjamini and Carlos Hoppen and Eran ofek and Pawel Pralat and Nick Wormald},
journal= {arXiv preprint arXiv:math/0610089},
year = {2007}
}