Tiling and spectral properties of near-cubic domains
Abstract
We prove that is a measurable domain tiles R or R2 by translations, and if it is "close enough" to a line segment or a square respectively, then it admits a lattice tiling. We also prove a similar result for spectral sets in dimension 1, and give an example showing that there is no analogue of the tiling result in dimensions 3 and higher.
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