Bandwidth theorem for random graphs
Abstract
A graph is said to have \textit{bandwidth} at most , if there exists a labeling of the vertices by , so that whenever is an edge of . Recently, B\"{o}ttcher, Schacht, and Taraz verified a conjecture of Bollob\'{a}s and Koml\'{o}s which says that for every positive , there exists such that if is an -vertex -chromatic graph with maximum degree at most which has bandwidth at most , then any graph on vertices with minimum degree at least contains a copy of for large enough . In this paper, we extend this theorem to dense random graphs. For bipartite , this answers an open question of B\"{o}ttcher, Kohayakawa, and Taraz. It appears that for non-bipartite the direct extension is not possible, and one needs in addition that some vertices of have independent neighborhoods. We also obtain an asymptotically tight bound for the maximum number of vertex disjoint copies of a fixed -chromatic graph which one can find in a spanning subgraph of with minimum degree .
Cite
@article{arxiv.1005.1947,
title = {Bandwidth theorem for random graphs},
author = {Hao Huang and Choongbum Lee and Benny Sudakov},
journal= {arXiv preprint arXiv:1005.1947},
year = {2015}
}
Comments
29 pages, 3 figures