An Improved Bound for Weak Epsilon-Nets in the Plane

An Improved Bound for Weak Epsilon-Nets in the Plane
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平面上弱 Epsilon 网的改进界限

DOI:
10.1145/3555985
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发表时间:
2018
期刊:
2018 IEEE 59th Annual Symposium on Foundations of Computer Science (FOCS)
影响因子:
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通讯作者:
Natan Rubin
Natan Rubin
中科院分区:
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文献类型:
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作者:
Natan Rubin

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我们证明了对于平面上的任意有限点集P,ε>0,存在O(1/ε^3/2+γ)个点,对于任意小的γ>0,它们穿透每个凸集K,|K P| ≥ ε |P|.这是对1992年Alon,Bárány,Füredi和Kleitman在平面上一般点集上得到的O(1)ε^2)的界的第一次改进。
We show that for any finite point set P in the plane and ε>0 there exist O(1/ε^3/2+γ) points, for arbitrary small γ>0, that pierce every convex set K with |K∩ P|≥ ε |P|. This is the first improvement of the bound of O(1)ε^2) that was obtained in 1992 by Alon, Bárány, Füredi and Kleitman for general point sets in the plane.