可见格点衍射与无k次幂整数
Diffraction from visible lattice points and k-th power free integers
摘要:
本文证明了任意维数至少为2的格点的可见点集具有纯点衍射谱,并明确地确定了衍射谱。这解决了先前关于这种情况下衍射的确切性质的推测,参见math-ph/9903046及其参考文献。使用类似的方法,我们证明了相同的结果为1维的k次幂自由整数的集合,其中k至少为2。特别有趣的是,这两个集都不是Delone集-每个集都有无限内径的洞。我们提供了一个仔细制定的数学思想基础的研究衍射从无限点集。
英文摘要:
We prove that the set of visible points of any lattice of dimension at least 2 has pure point diffraction spectrum, and we determine the diffraction spectrum explicitly. This settles previous speculation on the exact nature of the diffraction in this situation, see math-ph/9903046 and references therein. Using similar methods we show the same result for the 1-dimensional set of k-th power free integers with k at least 2. Of special interest is the fact that neither of these sets is a Delone set --- each has holes of unbounded inradius. We provide a careful formulation of the mathematical ideas underlying the study of diffraction from infinite point sets.
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