On K_(1,k)-factorization of bipartite multigraphs  

On K_(1,k)-factorization of bipartite multigraphs

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作  者:WANG Jian 

机构地区:[1]Nantong Vocational College, Nantong 226007, China

出  处:《Applied Mathematics(A Journal of Chinese Universities)》2008年第3期345-350,共6页高校应用数学学报(英文版)(B辑)

基  金:the National Natural Science Foundation of China (10571133)

摘  要:A K1,k-factorization of λKm,n is a set of edge-disjoint K1,k-factors of λKm,n, which partition the set of edges of λKm,n. In this paper, it is proved that a sufficient condition for the existence of K1,k-factorization of λKm,n, whenever k is any positive integer, is that (1) m ≤ kn, (2) n ≤ km, (3) km-n = kn-m ≡ 0 (mod (k^2- 1)) and (4) λ(km-n)(kn-m) ≡ 0 (mod k(k- 1)(k^2 - 1)(m + n)).A K1,k-factorization of λKm,n is a set of edge-disjoint K1,k-factors of λKm,n, which partition the set of edges of λKm,n. In this paper, it is proved that a sufficient condition for the existence of K1,k-factorization of λKm,n, whenever k is any positive integer, is that (1) m ≤ kn, (2) n ≤ km, (3) km-n = kn-m ≡ 0 (mod (k^2- 1)) and (4) λ(km-n)(kn-m) ≡ 0 (mod k(k- 1)(k^2 - 1)(m + n)).

关 键 词:FACTOR FACTORIZATION bipartite multigraph 

分 类 号:O175.2[理学—数学]

 

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