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A note on the chromaticity of some 2-connected (n,n+3)-graphs

โœ Scribed by F.M. Dong; K.L. Teo; K.M. Koh


Book ID
108315672
Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
77 KB
Volume
243
Category
Article
ISSN
0012-365X

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Let S denote the class of 2-connected (n, n + 2)-graphs which have girth 5 and are not homeomorphic to K4. Chromatic classes of graphs in S are determined in this paper.

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Chromatic classes of 2-connected (n, n + 2)-graphs which are horneomorphic to K4 and have girth 5 are given in this paper. Lemma 1. (a) If(6,~,rl)ยข Uj~3{(j,j-2,j+ 1), (j-2,j+2,j-1)} andFl (6,~,rl)~ Fl(6t, y',rlt ), then F1(6,7,~/) ~ Ft(6',7',ยข).