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Sufficient Conditions for a Connected Graph to Have a Hamiltonian Path

机译:连通图具有哈密顿路径的充分条件

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Let G be a connected graph on n vertices. Let σ_k(G) be the least possible value that is obtained as the sum of the degrees of k pairwise distinct and non-adjacent vertices. We show that if one of the following conditions is satisfied: - σ_3 (G) ≥ n and there is a longest cycle in G which is not a dominating cycle, - σ_2(G) > 2/3 n and G is K_(1,4)-free (i.e. without induced K_(1,4)), - each triple of pairwise non-adjacent vertices contains two vertices u and v such that deg_G(u) + deg_G(v) ≥ n - 1, then G contains a Hamiltonian path.
机译:令G为n个顶点上的连通图。令σ_k(G)是作为k对成对的不相邻顶点的度数之和而获得的最小可能值。我们证明如果满足以下条件之一:-σ_3(G)≥n并且G中存在一个最长的周期,而不是一个主导周期,-σ_2(G)> 2/3 n且G为K_(1 ,4)-free(即没有诱导的K_(1,4)),-每对成对的非相邻顶点包含两个顶点u和v,使得deg_G(u)+ deg_G(v)≥n-1,然后是G包含哈密顿路径。

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