Quantitative combinatorial geometry for concave functions
Quantitative combinatorial geometry for concave functions
复制标题
凹函数的定量组合几何
DOI:
10.1016/j.jcta.2021.105465
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Soberón, Pablo
中科院分区:
文献类型:
--
作者:
Sarkar, Sherry;Xue, Alexander;Soberón, Pablo
We prove several exact quantitative versions of Helly's and Tverberg's theorems, which guarantee that a finite family of convex sets in R d has a large intersection. Our results characterize conditions that are sufficient for the intersection of a family of convex sets to contain a “witness set” which is large under some concave or log-concave measure. The possible witness sets include ellipsoids, zonotopes, and H-convex sets. Our results show that several new optimization problems can be solved with algorithms for LP-type problems. We obtain colorful and fractional variants of all our Helly-type theorems.
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发表时间:
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期刊:
arXiv: Algebraic Topology
影响因子:
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作者:
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影响因子:
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影响因子:
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