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arXiv 1607.06985math.COmath.ATmath.PR
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随机单纯复形的积分同调

Integral homology of random simplicial complexes

Tomasz Łuczak, Yuval Peled

摘要:

随机$2$维单纯复形过程开始于$n$顶点上的完全图,并且在每一步中添加均匀随机选择的新的$2$维面。证明了当概率趋于$1$为$n\to\infty$时,当$\mathbb Z$上的所有边被三角面覆盖时,第一同调群为零.

英文摘要:

The random $2$-dimensional simplicial complex process starts with a complete graph on $n$ vertices, and in every step a new $2$-dimensional face, chosen uniformly at random, is added. We prove that with probability tending to $1$ as $n\to\infty$, the first homology group over $\mathbb Z$ vanishes at the very moment when all the edges are covered by triangular faces.

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