arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2001.08062cs.CG
收藏

空间任意点的手形位在小网格上的可实现性

Chirotopes of Random Points in Space are Realizable on a Small Integer Grid

Jean Cardinal, Ruy Fabila-Monroy, Carlos Hidalgo-Toscano

摘要:

我们证明,以高概率,一个均匀的样本的$n$点在一个凸域中$\mathbb{R}^d$可以四舍五入的网格上的点的步长成比例的$1/n^{d+1+ε}$,而不改变底层的手形(定向拟阵)。因此,随机点集的手性位可以用$O(n\log n)$位编码。这与最坏情况形成鲜明对比,在最坏情况下,即使对于$d=2$,网格也可能被迫具有步长$1/2^{2^{Ω(n)}}$。这个结果是Fabila-Monroy和Huemer(2017)以及Devillers,Duchon,Glisse和Goaoc(2018)关于随机平面点集序类型的先前结果的高维推广。

英文摘要:

We prove that with high probability, a uniform sample of $n$ points in a convex domain in $\mathbb{R}^d$ can be rounded to points on a grid of step size proportional to $1/n^{d+1+ε}$ without changing the underlying chirotope (oriented matroid). Therefore, chirotopes of random point sets can be encoded with $O(n\log n)$ bits. This is in stark contrast to the worst case, where the grid may be forced to have step size $1/2^{2^{Ω(n)}}$ even for $d=2$. This result is a high-dimensional generalization of previous results on order types of random planar point sets due to Fabila-Monroy and Huemer (2017) and Devillers, Duchon, Glisse, and Goaoc (2018).

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。

↑