Decomposition of class II graphs into two class I graphs

Decomposition of class II graphs into two class I graphs
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将 II 类图分解为两个 I 类图

DOI:
10.1016/j.disc.2023.113610
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发表时间:
2023
影响因子:
0.8
通讯作者:
Zhao, Yue
Zhao, Yue
中科院分区:
数学3区
文献类型:
--
作者:
Cao, Yan;Jing, Guangming;Luo, Rong;Mkrtchyan, Vahan;Zhang, Cun-Quan;Zhao, Yue

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相似文献

摘要Mkrtchyan和Steffen(2012)[3]证明了每个II类简单图都可以分解为一个最大Δ-边可着色子图和一个匹配。进一步证明了每个色指数为Δ(G)+ k(k≥ 1)的图G都可以分解为一个最大Δ(G)-边可着色子图(不一定是I类)和一个k-边可着色子图.本文首先将他们的结果推广到多重图,证明了每个重数为μ的多重图G都可以分解为一个最大Δ(G)-边可着色子图和一个最大度不超过μ的子图.然后证明了每个色指数为Δ(G)+ k的图G都可以分解为两个I类子图H1和H2,使得Δ(H1)= Δ(G)和Δ(H2)= k,这是他们猜想的一个变化.
Abstract Mkrtchyan and Steffen (2012)[3] showed that every class II simple graph can be decomposed into a maximum Δ-edge-colorable subgraph and a matching. They further conjectured that every graph G with chromatic index Δ (G)+ k (k≥ 1) can be decomposed into a maximum Δ (G)-edge-colorable subgraph (not necessarily class I) and a k-edge-colorable subgraph. In this paper, we first generalize their result to multigraphs and show that every multigraph G with multiplicity μ can be decomposed into a maximum Δ (G)-edge-colorable subgraph and a subgraph with maximum degree at most μ. Then we prove that every graph G with chromatic index Δ (G)+ k can be decomposed into two class I subgraphs H 1 and H 2 such that Δ (H 1)= Δ (G) and Δ (H 2)= k, which is a variation of their conjecture.
II 类图的最大 Δ 边可着色子图
DOI: 10.1002/jgt.20629
发表时间: 2010
影响因子: 0.9
作者:
V. Mkrtchyan;E. Steffen
通讯作者: E. Steffen
关于三次图中的不相交匹配
DOI: 10.1016/j.disc.2010.02.007
发表时间: 2008
期刊: Discret. Math.
影响因子: --
作者:
V. Mkrtchyan;S. S. Petrosyan;Gagik N. Vardanyan
通讯作者: Gagik N. Vardanyan
DOI: 10.1016/j.disc.2008.11.017
发表时间: 2009
期刊: Discret. Math.
影响因子: --
作者:
Romeo Rizzi
通讯作者: Romeo Rizzi
DOI: 10.1016/0012-365x(94)00254-g
发表时间: 1996-01-15
影响因子: 0.8
作者:
Albertson, MO;Haas, R
通讯作者: Haas, R