Arrangeability and Clique Subdivisions
Arrangeability and Clique Subdivisions
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可安排性和集团细分
DOI:
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发表时间:
2013
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通讯作者:
R. Thomas
中科院分区:
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作者:
V. Rödl;R. Thomas
Let k be an integer. A graph G is k-arrangeable (concept introduced by Chen and Schelp) if the vertices of G can be numbered v 1, v 2, …, v n in such a way that for every integer i with 1 ≤ i ≤ n, at most k vertices among {v 1, v 2, …, v i } have a neighbor (v in { v_{i+1},v_{i+2},ldots,v_{n}}) that is adjacent to v i . We prove that for every integer p ≥ 1, if a graph G is not 2500(p + 1)8-arrangeable, then it contains a K p -subdivision. By a result of Chen and Schelp this implies that graphs with no K p -subdivision have “linearly bounded Ramsey numbers,” and by a result of Kierstead and Trotter it implies that such graphs have bounded “game chromatic number.”