An improvement to the Hilton-Zhao vertex-splitting conjecture
An improvement to the Hilton-Zhao vertex-splitting conjecture
复制标题
Hilton-Zhao顶点分裂猜想的改进
DOI:
10.1016/j.disc.2022.112902
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发表时间:
2022
影响因子:
0.8
通讯作者:
Shan, Songling
中科院分区:
文献类型:
--
作者:
Cao, Yan;Chen, Guantao;Shan, Songling
For a simple graph G, denote by n, Δ (G), and χ′(G) its order, maximum degree, and chromatic index, respectively. A graph G is edge-chromatic critical if χ′(G)= Δ (G)+ 1 and χ′(H)< χ′(G) for every proper subgraph H of G. Let G be an n-vertex connected regular class 1 graph, and let G⁎ be obtained from G by splitting one vertex of G into two vertices. Hilton and Zhao in 1997 conjectured that G⁎ must be edge-chromatic critical if Δ (G)> n/3, and they verified this when Δ (G)≥ n 2 (7− 1)≈ 0.82 n. In this paper, we prove it for Δ (G)≥ 0.75 n.
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DOI:
10.1016/s0012-365x(01)00230-8
发表时间:
2002
期刊:
Discret. Math.
影响因子:
--
作者:
Zi
通讯作者:
Zi
影响因子:
0.7
作者:
A. Vietri
通讯作者:
A. Vietri
DOI:
10.26493/1855-3974.2039.efc
发表时间:
2020
期刊:
Ars Math. Contemp.
影响因子:
--
作者:
S. Bonvicini;A. Vietri
通讯作者:
A. Vietri
影响因子:
1.1
作者:
Hilton, AJW;Zhao, C
通讯作者:
Zhao, C