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arXiv 1204.0403math.MG
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避免整数距离的集合

Sets avoiding integral distances

Sascha Kurz, Valery Mishkin

摘要:

本文研究欧几里得空间$\mathbb{R}^d$中的开点集,其中点对之间的距离不为整数。结果Furstenberg,Katznelson,和Weiss这样的集合必须勒贝格上密度为零。我们感兴趣的是如何大,这样的集可以在$d$维体积。我们根据连通分支的个数和维数确定了集合体积的上下界上界,并给出了一些精确值。我们的问题可以被看作是一种逆已知的问题集与成对的合理或整数距离。

英文摘要:

We study open point sets in Euclidean spaces $\mathbb{R}^d$ without a pair of points an integral distance apart. By a result of Furstenberg, Katznelson, and Weiss such sets must be of Lebesgue upper density zero. We are interested in how large such sets can be in $d$-dimensional volume. We determine the lower and upper bounds for the volumes of the sets in terms of the number of their connected components and dimension, and also give some exact values. Our problem can be viewed as a kind of inverse to known problems on sets with pairwise rational or integral distances.

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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