Spectrum of weak model sets with Borel windows. Issue 2 (8th June 2023)

• Record Type: Journal Article
• Authors: Keller, Gerhard; Richard, Christoph; Strungaru, Nicolae
• Is Part Of: Canadian mathematical bulletin =. Volume 66:Issue 2(2023)
• Page Start: 411
• Page End: 427
• Publication Date: 2023-06-08
• Subjects: 37A05 -- 37A30 -- 37A46 -- 43A25 -- 78A45; Cut-and-project scheme -- (weak) model set -- torus parametrization -- Mirsky measure -- B-free systems; Mathematics -- Periodicals; Mathematics; Periodicals; 510.5
• DOI: 10.4153/S0008439522000352
• Languages: English
• ISSNs: 0008-4395

Abstract

Abstract: Consider the extended hull of a weak model set together with its natural shift action. Equip the extended hull with the Mirsky measure, which is a certain natural pattern frequency measure. It is known that the extended hull is a measure-theoretic factor of some group rotation, which is called the underlying torus. Among other results, in the article Periods and factors of weak model sets, we showed that the extended hull is isomorphic to a factor group of the torus, where certain periods of the window of the weak model set have been factored out. This was proved for weak model sets having a compact window. In this note, we argue that the same results hold for arbitrary measurable and relatively compact windows. Our arguments crucially rely on Moody's work on uniform distribution in model sets. We also discuss implications for the diffraction of such weak model sets and discuss a new class of examples which are generic for the Mirsky measure.