Optimal bounds for a colorful Tverberg--Vrecica type problem
Optimal bounds for a colorful Tverberg--Vrecica type problem
复制标题
彩色 Tverberg-Vrecica 类型问题的最优界限
DOI:
10.1016/j.aim.2011.01.009
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
Günter M
中科院分区:
文献类型:
--
作者:
Blagojević;Pavle V M;Matschke;Benjamin;Ziegler;Günter M
We prove the following optimal colorful Tverberg–Vrećica type transversal theorem: For prime r and for any k+1 colored collections of points Cℓin Rd, Cℓ=⊎Ciℓ, |Cℓ|=(r−1)(d−k+1)+1, |Ciℓ|⩽r−1, ℓ=0,…,k, there are partitions of the collections Cℓinto colorful sets F1ℓ,…,Frℓsuch that there is a k-plane that meets all the convex hulls conv(Fjℓ), under the assumption that r(d−k) is even or k=0. Along the proof we obtain three results of independent interest: We present two alternative proofs for the special case k=0 (our optimal colored Tverberg theorem (2009) [2]), calculate the cohomological index for joins of chessboard complexes, and establish a new Borsuk–Ulam type theorem for [Formula: see text] -equivariant bundles that generalizes results of Volovikov (1996) [17] and Živaljević (1999) [21].
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影响因子:
0.9
作者:
E. Fadell;S. Husseini
通讯作者:
S. Husseini
DOI:
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发表时间:
1981
期刊:
影响因子:
--
作者:
I. Bárány;S. Shlosman;András Szücs
通讯作者:
András Szücs
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
R. Živaljević;S. Vrecica
通讯作者:
S. Vrecica
DOI:
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发表时间:
1996
期刊:
影响因子:
--
作者:
A. Volovikov
通讯作者:
A. Volovikov
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
E. Fadell;S. Husseini
通讯作者:
S. Husseini