Turán-type results for intersection graphs of boxes
Turán-type results for intersection graphs of boxes
复制标题
方框交集图的 Turán 型结果
DOI:
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复制
发表时间:
2020
期刊:
影响因子:
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通讯作者:
D. Zakharov
中科院分区:
文献类型:
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作者:
István Tomon;D. Zakharov
In this short note, we prove the following analog of the Kővári–Sós–Turán theorem for intersection graphs of boxes. If G is the intersection graph of n axis-parallel boxes in
$${{mathbb{R}}^d}$$
such that G contains no copy of K
t,t
, then G has at most ctn( log n)2d+3 edges, where c = c(d)>0 only depends on d. Our proof is based on exploring connections between boxicity, separation dimension and poset dimension. Using this approach, we also show that a construction of Basit, Chernikov, Starchenko, Tao and Tran of K2,2-free incidence graphs of points and rectangles in the plane can be used to disprove a conjecture of Alon, Basavaraju, Chandran, Mathew and Rajendraprasad. We show that there exist graphs of separation dimension 4 having superlinear number of edges.
DOI:
10.1017/fms.2021.52
发表时间:
2021
期刊:
Sigma
影响因子:
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作者:
Basit, Abdul;Chernikov, Artem;Starchenko, Sergei;Tao, Terence;Tran, Chieu-Minh
通讯作者:
Tran, Chieu-Minh