List Improper Colourings of Planar Graphs

List Improper Colourings of Planar Graphs
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DOI:
10.1017/s0963548399003752
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发表时间:
1999-05
期刊:
Combinatorics, Probability and Computing
影响因子:
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通讯作者:
R. Škrekovski
R. Škrekovski
中科院分区:
其他
文献类型:
--
作者:
R. Škrekovski

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一个图G是m-可选择的,但不适当d,或简称(m,d)*-可选择的,如果对每个列表分配L,其中[mid ]L(v)[mid ][ges ]m对每个v∈V(G),存在G的一个L-染色使得G的每个顶点至多有d个邻点与它同色.证明了每个平面图是(3,2)*-可选的,每个外平面图是(2,2)*-可选的.我们还提出了一些有趣的问题,这种着色。
A graph G is m-choosable with impropriety d, or simply (m, d)*-choosable, if for every list assignment L, where [mid ]L(v)[mid ][ges ]m for every v∈V(G), there exists an L-colouring of G such that each vertex of G has at most d neighbours coloured with the same colour as itself. We show that every planar graph is (3, 2)*-choosable and every outerplanar graph is (2, 2)*-choosable. We also propose some interesting problems about this colouring.