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Kn,n-E(nK2)的和数

2004 
整数集合的非空有限子集S的和图是(S,E),E={vv:u≠v,u+v∈S},图G的和数σ(G)=min{m≥0:存在(S,E)≌GUmK1}.证明σ(Kn,n-E(,nK2))=2n-3(n≥5).
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