Improvement on Brook theorem for (3 Times K1)-free Graphs
Combinatorics
2017-02-28 v1
Abstract
Problem of finding an optimal upper bound for the chromatic no. of a (3 Times K1)-free graph is still open and pretty hard. Here we prove that for a (3 Times K1)-free graph G with maximum degree greater than or equal to 8, {\chi} is less than or equal to max (maximum degree-1, {\omega}). We also prove that if G is (3 Times K1)-free, {\omega} is equal to 4 and maximum degree is greater than or equal to 7, then {\chi} is less than or equal to maximum degree-1. This implies that Borodin & Kostochka Conjecture is true for (3 Times K1)-free graphs as a corollary.
Cite
@article{arxiv.1702.08151,
title = {Improvement on Brook theorem for (3 Times K1)-free Graphs},
author = {Medha Dhurandhar},
journal= {arXiv preprint arXiv:1702.08151},
year = {2017}
}
Comments
4 pages