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Brooks' Theorem [PDF]

open access: bronze
Brooks' Theorem (1941) is one of the most famous and fundamental theorems in graph theory – it is mentioned/treated in all general monographs on graph theory. It has sparked research in several directions. This book presents a comprehensive overview of this development and see it in context.
Michael Stiebitz   +2 more
openalex   +2 more sources

Yet another proof of Brooks' theorem

open access: bronzeDiscrete Mathematics, 2022
Arguably the simplest variation of this style of proof as we avoid reducing to the cubic case entirely.
Landon Rabern
openalex   +5 more sources

An improvement on Brooks' Theorem [PDF]

open access: green, 2011
We prove that $ (G) \leq \max { (G), _2(G), (5/6)( (G) + 1)}$ for every graph $G$ with $ (G) \geq 3$. Here $ _2$ is the parameter introduced by Stacho that gives the largest degree that a vertex $v$ can have subject to the condition that $v$ is adjacent to a vertex whose degree is at least as large as its own.
Landon Rabern
openalex   +3 more sources

The Brooks–Chacon Biting Lemma, the Castaing–Saadoune Procedure, and the Baum–Katz Theorem Along Subsequences

open access: goldAxioms
We show how the Brooks–Chacon Biting Lemma can be combined with the Castaing–Saadoune procedure to provide the complete rate of convergence along subsequences when the uniformly boundedness condition is violated.
George Stoica, Deli Li, Liping Liu
doaj   +2 more sources

Zeros of Convex Combinations of Elementary Families of Harmonic Functions

open access: yesMathematics, 2023
Brilleslyper et al. investigated how the number of zeros of a one-parameter family of harmonic trinomials varies with a real parameter. Brooks and Lee obtained a similar theorem for an analogous family of harmonic trinomials with poles. In this paper, we
Jennifer Brooks   +4 more
doaj   +1 more source

Brooks' Theorem and Beyond [PDF]

open access: yesJournal of Graph Theory, 2014
AbstractWe collect some of our favorite proofs of Brooks' Theorem, highlighting advantages and extensions of each. The proofs illustrate some of the major techniques in graph coloring, such as greedy coloring, Kempe chains, hitting sets, and the Kernel Lemma. We also discuss standard strengthenings of vertex coloring, such as list coloring, online list
Cranston, Daniel W., Rabern, Landon
openaire   +2 more sources

Equitable colourings of Borel graphs

open access: yesForum of Mathematics, Pi, 2021
Hajnal and Szemerédi proved that if G is a finite graph with maximum degree $\Delta $ , then for every integer $k \geq \Delta +1$ , G has a proper colouring with k colours in which every two colour classes differ in size at most by $1$ ;
Anton Bernshteyn, Clinton T. Conley
doaj   +1 more source

Precoloring Extensions of Brooks' Theorem [PDF]

open access: yesSIAM Journal on Discrete Mathematics, 2004
Summary: Let \(G\) be a connected graph with maximum degree \(k\) (other than a complete graph or odd cycle), let \(W\) be a precolored set of vertices in \(G\) inducing a subgraph \(F\), and let \(D\) be the minimum distance in \(G\) between components of \(F\).
Albertson, Michael O.   +2 more
openaire   +2 more sources

Generalized Hypergraph Coloring

open access: yesDiscussiones Mathematicae Graph Theory, 2021
A smooth hypergraph property 𝒫 is a class of hypergraphs that is hereditary and non-trivial, i.e., closed under induced subhypergraphs and it contains a non-empty hypergraph but not all hypergraphs.
Schweser Thomas
doaj   +1 more source

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