Paths and animals in unbounded degree graphs with repulsion
Abstract
A class of countable infinite graphs with unbounded vertex degree is considered. In these graphs, the vertices of large degree `repel' each other, which means that the path distance between two such vertices cannot be smaller than a certain function of their degrees. Assuming that this function increases sufficiently fast, we prove that the number of finite connected subgraphs (animals) of order N containing a given vertex x is exponentially bounded in N for N belonging to an infinite subset N_x of natural numbers. Under a less restrictive condition, the same result is obtained for the number of simple paths originated at a given vertex. These results are then applied to a number of problems, including estimating the growth of the Randi\'c index and of the number of greedy animals.
Cite
@article{arxiv.1211.4212,
title = {Paths and animals in unbounded degree graphs with repulsion},
author = {Dorota Kȩpa-Maksymowicz and Yuri Kozitsky},
journal= {arXiv preprint arXiv:1211.4212},
year = {2012}
}