A class of edge critical 4-chromatic graphs

Guantao Chen, P. Erdős, A. Gyárfás, R. H. Schelp

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We consider several constructions of edge critical 4-chromatic graphs which can be written as the union of a bipartite graph and a matching. In particular we construct such a graph G with each of the following properties: G can be contracted to a given critical 4-chromatic graph; for each n ≥ 7, G has n vertices and three matching edges (it is also shown that such graphs must have at least 8n/5 edges); G has arbitrary large girth.

Original languageEnglish
Pages (from-to)139-146
Number of pages8
JournalGraphs and Combinatorics
Volume13
Issue number2
Publication statusPublished - 1997

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Graph in graph theory
Girth
Bipartite Graph
Union
Class
Arbitrary

ASJC Scopus subject areas

  • Mathematics(all)
  • Discrete Mathematics and Combinatorics

Cite this

A class of edge critical 4-chromatic graphs. / Chen, Guantao; Erdős, P.; Gyárfás, A.; Schelp, R. H.

In: Graphs and Combinatorics, Vol. 13, No. 2, 1997, p. 139-146.

Research output: Contribution to journalArticle

Chen, Guantao ; Erdős, P. ; Gyárfás, A. ; Schelp, R. H. / A class of edge critical 4-chromatic graphs. In: Graphs and Combinatorics. 1997 ; Vol. 13, No. 2. pp. 139-146.
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