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The existence spectrum of Meta(K_4^((3))>K_4^((3))-e)被引量：1
《Science China Mathematics》2010年第11期2865-2876,共12页LO FARO Giovanni TRIPODI Antoinette 
supported by National Natural Science Foundation of China (Grant Nos.10771013, 10901016) and by Prin, Pra and Indam (GNSAGA)
Let H and J1 be both t-uniform hypergraphs. Let J2 be a sub-hypergraph of J1. In this paper, the metamorphosis of a hypergraph decomposition is introduced, denoted by (H, J1 > J2)-design, which is a generalization ...
关键词：HYPERGRAPH decomposition METAMORPHOSIS t-GDD group divisible (Γ t)-design candelabra (Γ t)-system 
Large Sets of Pure Directed Triple Systems with Index λ被引量：1
《Acta Mathematica Sinica,English Series》2010年第10期1899-1914,共16页Bing Li FAN Jun Ling ZHOU 
Supported by National Natural Science Foundation of China (Grant Nos. 10771013 and 10831002)
A directed triple system of order v with index λ, briefly by DTS（v,λ）, is a pair （X, B） where X is a v-set and B is a collection of transitive triples （blocks） on X such that every ordered pair of X belongs to...
关键词：Large set directed triple system PURE 
Determination of the packing number D_λ(3,W_4^((3)),v)被引量：3
《Science China Mathematics》2009年第11期2537-2548,共12页WU Yan & CHANG YanXun Institute of Mathematics,Beijing Jiaotong University,Beijing 100044,China 
supported by National Natural Science Foundation of China (Grant Nos. 10771013, 10831002)
A t-hyperwheel(t≥3) of length l(or W l(t) for brevity) is a t-uniform hypergraph(V,E) ,where E = {e1,e2,. . .,el} and v1,v2,. . .,vl are distinct vertices of V = il=1 ei such that for i = 1,. . .,l,vi,vi+1 ∈ ei and ...
关键词：t-(v Γ λ) PACKING LEAVE PACKING NUMBER GROUP divisible(Γ t) -design candelabra(Γ t) -system 
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