Large simplicial complexes: universality, randomness, and ampleness
Large simplicial complexes: universality, randomness, and ampleness
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大型单纯复形:普遍性、随机性和丰富性
DOI:
10.1007/s41468-023-00134-9
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发表时间:
2023
期刊:
影响因子:
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通讯作者:
Farber M
中科院分区:
文献类型:
--
作者:
Farber M
The paper surveys recent progress in understanding geometric, topological and combinatorial properties of large simplicial complexes, focusing mainly on ampleness, connectivity and universality (Even-Zohar et al. in Eur J Math 8(1):1–32, 2022; Farber and Mead in Topol Appl 272(22):107065, 2020; Farber et al. in J Appl Comput Topol 5(2):339–356, 2021). In the first part of the paper we concentrate onr-ample simplicial complexes which are high dimensional analogues of ther-e.c. graphs introduced originally by Erdős and Rényi (Acta Math Acad Sci Hungar 14:295–315, 1963), see also Bonato (Contrib Discrete Math 4(1):40–53, 2009). The class ofr-ample complexes is useful for applications since these complexes allow extensions of subcomplexes of certain type in all possible ways; besides,r-ample complexes exhibit remarkable robustness properties. We discuss results about the existence ofr-ample complexes and describe their probabilistic and deterministic constructions. The properties of random simplicial complexes in medial regime (Farber and Mead 2020) are important for this discussion since these complexes are ample, in certain range. We prove that the topological complexity of a random simplicial complex in the medial regime satisfies, with probability tending to 1 as. There exists a unique (up to isomorphism)-ample complex on countable set of vertexes (the Rado complex), and the second part of the paper surveys the results about universality, homogeneity, indestructibility and other important properties of this complex. The Appendix written by J.A. Barmak discusses connectivity of conic and ample complexes.
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DOI:
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发表时间:
2003
期刊:
影响因子:
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作者:
V. Uspenskij
通讯作者:
V. Uspenskij
DOI:
10.11575/cdm.v4i1.61874
发表时间:
2009
期刊:
Contributions Discret. Math.
影响因子:
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作者:
A. Bonato
通讯作者:
A. Bonato
DOI:
--
发表时间:
1971
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影响因子:
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作者:
B. Rotman
通讯作者:
B. Rotman
DOI:
--
发表时间:
1937
期刊:
影响因子:
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作者:
W. Ackermann
通讯作者:
W. Ackermann
DOI:
10.1002/jgt.3190050414
发表时间:
1981
期刊:
J. Graph Theory
影响因子:
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作者:
A. Blass;G. Exoo;F. Harary
通讯作者:
F. Harary