The core conjecture of Hilton and Zhao
The core conjecture of Hilton and Zhao
复制标题
希尔顿和赵的核心猜想
DOI:
10.1016/j.jctb.2024.01.004
复制
发表时间:
2024
期刊:
影响因子:
--
通讯作者:
Shan, Songling
中科院分区:
文献类型:
--
作者:
Cao, Yan;Chen, Guantao;Jing, Guangming;Shan, Songling
A simple graph G with maximum degree Δ is overfull if| E (G)|> Δ⌊| V (G)|/2⌋. The core of G, denoted G Δ, is the subgraph of G induced by its vertices of degree Δ. Clearly, the chromatic index of G equals Δ+ 1 if G is overfull. Conversely, Hilton and Zhao in 1996 conjectured that if G is a simple connected graph with Δ≥ 3 and Δ (G Δ)≤ 2, then χ′(G)= Δ+ 1 implies that G is overfull or G= P⁎, where P⁎ is obtained from the Petersen graph by deleting a vertex. Cariolaro and Cariolaro settled the base case Δ= 3 in 2003, and Cranston and Rabern proved the next case, Δ= 4, in 2019. In this paper, we give a proof of this conjecture for all Δ≥ 4.
影响因子:
0.8
作者:
A. Ehrenfeucht;V. Faber;H. Kierstead
通讯作者:
H. Kierstead
DOI:
10.37236/1699
发表时间:
2003-01
期刊:
Electron. J. Comb.
影响因子:
--
作者:
David Cariolaro;G. Cariolaro
通讯作者:
David Cariolaro;G. Cariolaro