Induced subgraphs of graphs with large chromatic number. IV. Consecutive holes

A hole in a graph is an induced subgraph which is a cycle of length at least four. We prove that for all ν > 0, every triangle-free graph with sufficiently large chromatic number contains holes of ν consecutive lengths.

Bibliographic Details
Main Authors: Scott, A, Seymour, P
Format: Journal article
Published: Elsevier 2018
Description
Summary:A hole in a graph is an induced subgraph which is a cycle of length at least four. We prove that for all ν > 0, every triangle-free graph with sufficiently large chromatic number contains holes of ν consecutive lengths.