On Ramsey minimal graphs
On Ramsey minimal graphs
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关于拉姆齐最小图
DOI:
10.1016/j.disc.2003.11.043
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发表时间:
2004
期刊:
影响因子:
--
通讯作者:
E. Sidorowicz
中科院分区:
文献类型:
--
作者:
M. Borowiecki;Mariusz Haluszczak;E. Sidorowicz
For graphs G, F and H we write G→(F,H) to mean that if the edges of G are coloured with two colours, say red and blue, then the red subgraph contains a copy of F or the blue subgraph contains a copy of H. The graph G is (F,H)-minimal (Ramsey-minimal) if G→(F,H) but G′↛(F,H) for any proper subgraph G′⊆G. The class of all (F,H)-minimal graphs will be denoted by R (F,H) . In this paper we will give two equivalent theorems which characterize the graphs belonging to R (K1,2,K1,m) for m⩾3.