H-packing of k-chromatic graphs

H-packing of k-chromatic graphs
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k 色图的 H 堆积

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发表时间:
2012
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通讯作者:
R. Yuster
R. Yuster
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作者:
R. Yuster

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对于图H和G,设pH(G)表示G中H的一组边不相交的副本所覆盖的最大边数.证明了若H是k色的,则pH(G)> > pKk(G)o V(G)2 .误差项不能得到很大的改进,因为对于任意的p> 0,存在p(H)= k的图H使得对于任意的n足够大,存在n阶图G使得p H(G)6 pKk(G)n 2 p。我们给出了这个结果在极值图中的几个应用
For graphs H and G, let pH(G) denote the maximum number of edges covered by a set of edge-disjoint copies of H in G. We prove that if H is k-chromatic, then pH(G) > > pKk (G) o V(G) 2 . The error term cannot be improved much, as for any � > 0 there are graphs H with � (H) = k such that for all n sufciently large, there are graphs G with n vertices for which pH(G) 6 pKk (G) n 2 � . We present several applications of this result in extremal graph