A short nonalgorithmic proof of the containers theorem for hypergraphs
A short nonalgorithmic proof of the containers theorem for hypergraphs
复制标题
超图容器定理的简短非算法证明
DOI:
10.1090/proc/14368
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发表时间:
2019
影响因子:
1
通讯作者:
Bernshteyn A
中科院分区:
文献类型:
--
作者:
Bernshteyn A
Recently the breakthrough method of hypergraph containers, developed independently by Balogh, Morris, and Samotij [J. Amer. Math. Soc. 28 (2015), pp. 669–709] as well as Saxton and Thomason [Invent. Math. 201 (2015), pp. 925–992], has been used to study sparse random analogs of a variety of classical problems from combinatorics and number theory. The previously known proofs of the containers theorem use the so-called scythe algorithm—an iterative procedure that runs through the vertices of the hypergraph.(Saxton and Thomason [Combin. Probab. Comput. 25 (2016), pp. 448–459] have also proposed an alternative, randomized construction in the case of simple hypergraphs.) Here we present the first known deterministic proof of the containers theorem that is not algorithmic, ie, it does not involve an iterative process. Our proof is less than four pages long while being entirely self-contained and conceptually transparent. Although our proof is completely elementary, it was inspired by considering hypergraphs in the setting of nonstandard analysis, where there is a notion of dimension capturing the logarithmic rate of growth of finite sets. Before presenting the proof in full detail, we include a one page informal outline that refers to this notion of dimension and summarizes the essence of the argument. References
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DOI:
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发表时间:
2008
期刊:
影响因子:
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作者:
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1998
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2014
期刊:
Combinatorics, probability & computing
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2010
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2014
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