Crossing Patterns of Segments

Crossing Patterns of Segments
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线段的交叉模式

DOI:
10.1006/jcta.2001.3184
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发表时间:
2001
期刊:
J. Comb. Theory A
影响因子:
--
通讯作者:
J. Solymosi
J. Solymosi
中科院分区:
--
文献类型:
--
作者:
J. Pach;J. Solymosi

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结果表明,对于每一个c b>0,存在c?>0满足以下条件。设S是平面上n个直线段的系统,它们至少有cn2个交点。那么有两个不相交的至少c?n元子系统,S1 S2?S,使得S1的每个元素与S2的所有元素交叉。
It is shown that for every c>0 there exists c?>0 satisfying the following condition. Let S be a system of n straight-line segments in the plane, which determine at least cn2 crossings. Then there are two disjoint at least c?n-element subsystems, S1, S2?S, such that every element of S1 crosses all elements of S2.