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Pure Point Diffraction and Mean, Besicovitch and Weyl Almost Periodicity

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arxiv 2006.10821 v2 pith:WHOSMW57 submitted 2020-06-18 math.CA math.FA

classification math.CAmath.FA
keywords diffractionpointpurealmostboundedmeasureonlyperiodic
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We show that a translation bounded measure has pure point diffraction if and only if it is mean almost periodic. We then go on and show that a translation bounded measure has pure point diffraction and satisfies the so called consistent phase property if and only if it is Besicovitch almost periodic. Finally, we show that a translation bounded measure has pure point diffraction and satisfies the consistent phase property independent of the underlying van Hove sequence if and only if it is Weyl almost periodic. These results solve fundamental issues in the theory of pure point diffraction and answer questions of Lagarias.

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  1. Twice Fourier transformable measures and diffraction theory

    math-ph 2024-11 accept novelty 4.0 of 10

    A measure is twice Fourier transformable exactly when it is translation bounded and AG transformable, and this powers new Poisson summation and pure point diffraction formulas for weighted model sets.

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