The Universality of the Resonance Arrangement and Its Betti Numbers
The Universality of the Resonance Arrangement and Its Betti Numbers
复制标题
共振排列的普遍性及其贝蒂数
DOI:
10.1007/s00493-023-00006-x
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发表时间:
2020
期刊:
影响因子:
1.1
通讯作者:
L. Kühne
中科院分区:
文献类型:
--
作者:
L. Kühne
The resonance arrangement $$\mathcal {A}_n$$ A n is the arrangement of hyperplanes which has all non-zero 0/1-vectors in $$\mathbb {R}^n$$ R n as normal vectors. It is the adjoint of the Braid arrangement and is also called the all-subsets arrangement. The first result of this article shows that any rational hyperplane arrangement is the minor of some large enough resonance arrangement. Its chambers appear as regions of polynomiality in algebraic geometry, as generalized retarded functions in mathematical physics and as maximal unbalanced families that have applications in economics. One way to compute the number of chambers of any real arrangement is through the coefficients of its characteristic polynomial which are called Betti numbers. We show that the Betti numbers of the resonance arrangement are determined by a fixed combination of Stirling numbers of the second kind. Lastly, we develop exact formulas for the first two non-trivial Betti numbers of the resonance arrangement.
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DOI:
10.1090/bproc/71
发表时间:
2021
期刊:
Series B
影响因子:
--
作者:
Proudfoot, Nicholas;Ramos, Eric
通讯作者:
Ramos, Eric
影响因子:
1
作者:
Billey, Sara C.;Rhoades, Brendon;Tewari, Vasu
通讯作者:
Tewari, Vasu
影响因子:
8.3
作者:
Zachrison,KoriS;Goldstein,JoshuaN
通讯作者:
Goldstein,JoshuaN
DOI:
10.37236/8759
发表时间:
2021
期刊:
The Electronic Journal of Combinatorics
影响因子:
--
作者:
Gutekunst, Samuel C.;Mészáros, Karola;Petersen, T. Kyle
通讯作者:
Petersen, T. Kyle