The minimum degree of Ramsey‐minimal graphs
The minimum degree of Ramsey‐minimal graphs
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Ramsey 最小图的最小度
DOI:
10.1002/jgt.20199
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发表时间:
2007
影响因子:
0.9
通讯作者:
Kathy Lin
中科院分区:
文献类型:
--
作者:
J. Fox;Kathy Lin
We write H → G if every 2‐coloring of the edges of graph H contains a monochromatic copy of graph G. A graph H is G‐minimal if H → G, but for every proper subgraph H′ of H, H′ ↛ G. We define s(G) to be the minimum s such that there exists a G‐minimal graph with a vertex of degree s. We prove that s(Kk) = (k − 1)2 and s(Ka,b) = 2 min(a,b) − 1. We also pose several related open problems. © 2006 Wiley Periodicals, Inc. J Graph Theory 54: 167–177, 2007