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机构地区:[1]华东师范大学数学系
出 处:《华东师范大学学报(自然科学版)》2006年第3期37-43,共7页Journal of East China Normal University(Natural Science)
基 金:国家自然科学基金(10271048)
摘 要:结合边连通度,探讨了独立集中具有最小特定度和的点的上可嵌入图.得到了下列结果.(1)设G是一个2-边连通简单图且满足条件:对任意一个G的3-独立集I,x_i,x_j∈I(i,j=1,2,3),d(x_i,x_j)≥3(1≤i≠j≤3)sum from i=1 to 3 d(x_i)≥v+1 (v=V(G)),则G是上可嵌入的;(2)设G是一个3-边连通简单图且满足条件:对任意一个G的6-独立集I,x_i,x_j∈I(i,j=1,2,3,4,5,6),d(x_i,x_j)≥3(1≤i≠j≤6)sum from i=1 to 6 d(x_i)≥v+1(v=|V(G)|),则G是上可嵌入的.Combined with the edge-connectivity, this paper investigated the upper embeddable graphs with specific minimum degree-sum of vertices in its independent-set, and obtained the following results. (1) Let G be a 2-edge-connected simple graph, if G satisfies the following conditions: for any 3-independent set I in G, for any xi,xj ∈ I (i,j = 1,2,3), d(xi,xj) ≥ 3 (1 ≤ i ≠ j ≤ 3) detrude ∑^3 i=1 d(xi) ≥v+1 (v=│V(G)│), then G is upper embeddable; (2) Let G be a 3-edgeconnected simple graph, if G satisfies the following conditions: for any 6-independent set I in G, 6 for any xu,xj ∈ I (1≤i,j≤6),d(xi,xj) ≥3(1 ≤i≠j ≠6) detrude ∑^6 i=1 d(xi)≥v+1 (v= │V(G)│),the nG is upper embeddable.
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