Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1258980 | Journal of the Association of Arab Universities for Basic and Applied Sciences | 2014 | 6 Pages |
Abstract
Let P(G,λ) be the chromatic polynomial of a graph G. Two graphs G and H are said to be chromatically equivalent, denoted G ∼ H, if P(G,λ) = P(H,λ). We write [G] = {H∣H ∼ G}. If [G] = {G}, then G is said to be chromatically unique. In this paper, we first characterize certain complete 5-partite graphs G with 5n vertices according to the number of 6-independent partitions of G. Using these results, we investigate the chromaticity of G with certain stars or matching deleted parts . As a by-product, two new families of chromatically unique complete 5-partite graphs G with certain stars or matching deleted parts are obtained.
Related Topics
Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
R. Hasni, A. Shaman, G.C. Lau,