Abstract
We study the Fourier-Walsh spectrum \(\{ \widehat \mu (S);S \subset \{ 1, \ldots n\} \} \) of the Moebius function µ restricted to {0, 1, 2, …, 2n − 1} ≅ {0, 1}n and prove that it is not captured by levels \(\{ \widehat \mu (S):|S| < \rho n\} \), with ρ a sufficiently small constant. This improves the author’s earlier result in [B2].
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Bourgain, J. On the Fourier-Walsh spectrum of the Moebius function, II. JAMA 128, 355–367 (2016). https://doi.org/10.1007/s11854-016-0012-1
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DOI: https://doi.org/10.1007/s11854-016-0012-1