Vertex colouring edge partitions
Vertex colouring edge partitions
复制标题
DOI:
10.1016/j.jctb.2005.01.001
复制
发表时间:
2005-07
期刊:
影响因子:
--
通讯作者:
L. Addario-Berry;R. Aldred;Ketan Dalal;B. Reed
中科院分区:
文献类型:
--
作者:
L. Addario-Berry;R. Aldred;Ketan Dalal;B. Reed
A partition of the edges of a graph G into sets {S1,…,Sk} defines a multiset Xvfor each vertex v where the multiplicity of i in Xvis the number of edges incident to v in Si. We show that the edges of every graph can be partitioned into 4 sets such that the resultant multisets give a vertex colouring of G. In other words, for every edge (u,v) of G, Xu≠Xv. Furthermore, if G has minimum degree at least 1000, then there is a partition of E(G) into 3 sets such that the corresponding multisets yield a vertex colouring.