Random simplicial complexes in the medial regime
Random simplicial complexes in the medial regime
复制标题
中间状态中的随机单纯复形
DOI:
10.1016/j.topol.2020.107065
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发表时间:
2020
影响因子:
0.6
通讯作者:
Farber M
中科院分区:
文献类型:
--
作者:
Farber M
We describe topology of random simplicial complexes in the lower and upper models in the medial regime, ie under the assumption that the probability parameters p σ approach neither 0 nor 1. The medial regime includes as a special case the simplest and most natural assumption that all probability parameters p σ are equal to each other and are independent of n. We show that nontrivial Betti numbers of typical lower and upper random simplicial complexes in the medial regime lie in a narrow range of dimensions. For instance, an upper random simplicial complex Y on n vertices in the medial regime with high probability has non-vanishing Betti numbers b j (Y) only for k+ c< n− j< k+ log 2 k+ c′ where k= log 2 ln n and c, c′ are constants. A lower random simplicial complex on n vertices in the medial regime is, with high probability,(k+ a)-connected and its dimension d satisfies d∼ k+ log 2 k+ a′ where a, a′ are constants. The proofs employ a new technique, based on Alexander duality, which relates the lower and upper models.
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DOI:
10.1017/s096354831800010x
发表时间:
2014
期刊:
Combinatorics, Probability and Computing
影响因子:
--
作者:
Oliver Cooley;Mihyun Kang;Y. Person
通讯作者:
Y. Person
DOI:
--
发表时间:
2006
期刊:
Comb.
影响因子:
--
作者:
N. Linial;R. Meshulam
通讯作者:
R. Meshulam
影响因子:
0.8
作者:
Costa A
通讯作者:
Costa A
影响因子:
0.8
作者:
A. Björner;M. Tancer
通讯作者:
M. Tancer
影响因子:
0.8
作者:
Farber M
通讯作者:
Farber M