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arXiv 2109.04855math.COmath.GT
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少顶点单纯复形的嵌入维数

Embedding dimensions of simplicial complexes on few vertices

Florian Frick, Mirabel Hu, Verity Scheel, Steven Simon

AI总结:

该研究给出少顶点单纯复形可嵌入d-球面的充要条件,由此重获经典定理并推广相关结论,还证明这类复形的连续与线性嵌入等价。

摘要:

我们给出了少顶点且可嵌入d-球面的单纯复形的简单刻画:即含d+3个顶点的单纯复形可嵌入d-球面,当且仅当其非面不构成一个相交族。作为直接推论,我们重新得到了经典的van Kampen–Flores定理,并给出了Erdős–Ko–Rado定理的拓扑推广。通过类比平面图的Fáry定理,我们还证明这类复形满足刚性性质:连续嵌入与线性嵌入等价。

英文摘要:

We provide a simple characterization of simplicial complexes on few vertices that embed into the $d$-sphere. Namely, a simplicial complex on $d+3$ vertices embeds into the $d$-sphere if and only if its non-faces do not form an intersecting family. As immediate consequences, we recover the classical van Kampen--Flores theorem and provide a topological extension of the Erd\H os--Ko--Rado theorem. By analogy with Fáry's theorem for planar graphs, we show in addition that such complexes satisfy the rigidity property that continuous and linear embeddability are equivalent.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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