Topological Graphs with No Large Grids
Topological Graphs with No Large Grids
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没有大网格的拓扑图
DOI:
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发表时间:
2005
期刊:
影响因子:
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通讯作者:
G. Tóth
中科院分区:
文献类型:
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作者:
J. Pach;R. Pinchasi;M. Sharir;G. Tóth
Let G be a topological graph with n vertices, i.e., a graph drawn in the plane with edges drawn as simple Jordan curves. It is shown that, for any constants k,l, there exists another constant C(k,l), such that if G has at least C(k,l)n edges, then it contains a k×l-gridlike configuration, that is, it contains k+l edges such that each of the first k edges crosses each of the last l edges. Moreover, one can require the first k edges to be incident to the same vertex.