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arXiv 1607.01599math.CO
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拟阵的Tverberg型定理

A Tverberg type theorem for matroids

Imre Bárány, Gil Kalai, Roy Meshulam

摘要:

设b(M)表示拟阵M中不交基的最大个数。本文证明了:若M是秩为d+1的拟阵,则对从拟阵复形M到d维欧几里得空间的任意连续映射f,存在t个\geq/4个不相交的独立集σ_1,\ldots,σ_PDMATHABMP M,使得\bigcap_{i=1}^t f(σ_i)\neq \emptyset .

英文摘要:

Let b(M) denote the maximal number of disjoint bases in a matroid M. It is shown that if M is a matroid of rank d+1, then for any continuous map f from the matroidal complex M into the d-dimensional Euclidean space there exist t \geq \sqrt{b(M)}/4 disjoint independent sets σ_1,\ldots,σ_t \in M such that \bigcap_{i=1}^t f(σ_i) \neq \emptyset.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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