Stellar theory for flag complexes

Stellar theory for flag complexes
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旗帜复合体的恒星理论

DOI:
10.7146/math.scand.a-23297
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发表时间:
2013
期刊:
arXiv: Combinatorics
影响因子:
--
通讯作者:
Eran Nevo
Eran Nevo
中科院分区:
--
文献类型:
--
作者:
Frank H. Lutz;Eran Nevo

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完善 Alexander 的基本结果,我们证明两个标志单纯复形是分段线性同胚的当且仅当它们可以通过一系列标志复形连接,每个标志复形都是通过边细分或其逆从前一个标志复形获得的。对于旗球体,我们对其面数强制的组合结构提出新的猜想,类似于单纯球体上下界定理中的极值示例。此外,我们证明了我们的测试猜想的算法可以搜索任何给定维度的标志 PL 球体的整个空间。
Refining a basic result of Alexander, we show that two flag simplicial complexes are piecewise linearly homeomorphic if and only if they can be connected by a sequence of flag complexes, each obtained from the previous one by either an edge subdivision or its inverse. For flag spheres we pose new conjectures on their combinatorial structure forced by their face numbers, analogous to the extremal examples in the upper and lower bound theorems for simplicial spheres. Furthermore, we show that our algorithm to test the conjectures searches through the entire space of flag PL spheres of any given dimension.
赫希猜想适用于正常旗形复合体
DOI: 10.1287/moor.2014.0661
发表时间: 2014
期刊: Math. Oper. Res.
影响因子: --
作者:
Karim Adiprasito;Bruno Benedetti
通讯作者: Bruno Benedetti