| Packings and Coverings of λK_v with 2 Graphs of 6 Vertices and 7 Edges |
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| 作者单位： | Yan Ke DU(Institute of Applied Mathematics,Mechanical Engineering College,Hebei 050003,P.R.China);Qing De KANG(Institute of Mathematics,Hebei Normal University,Hebei 050016,P.R.China) |
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| 基金项目： | Supported by the National Natural Science Foundation of China (Grant No.10671055) |
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| 摘 要： | A maximum(v,G,λ)-PD and a minimum(v,G,λ)-CD are studied for 2 graphs of 6 vertices and 7 edges.By means of difference method and holey graph design,we obtain the result:there exists a(v,Gi,λ)-OPD(OCD) for v ≡ 2,3,4,5,6(mod 7),λ ≥ 1,i = 1,2.
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