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Distribution of small values of Bohr almost periodic functions with bounded spectrum
Wayne M. Lawton Institute of Mathematics and Computer Science, Siberian Federal University, Svobodny, 79, Krasnoyarsk, 660041, Russia
Abstract:
For $f$ a nonzero Bohr almost periodic function on $\mathbb R$ with a bounded spectrum we proved there exist $C_f > 0$ and integer $n > 0$ such that for every $u > 0$ the mean measure of the set $\{\, x \, : \, |f(x)| < u \, \}$ is less than $C_f\, u^{1/n}.$ For trigonometric polynomials with $\leq n + 1$ frequencies we showed that $C_f$ can be chosen to depend only on $n$ and the modulus of the largest coefficient of $f.$ We showed this bound implies that the Mahler measure $M(h),$ of the lift $h$ of $f$ to a compactification $G$ of $\mathbb R,$ is positive and discussed the relationship of Mahler measure to the Riemann Hypothesis.
Keywords:
almost periodic function, entire function, Beurling factorization, Mahler measure, Riemann hypothesis.
Received: 10.05.2019 Received in revised form: 10.06.2019 Accepted: 20.09.2019
Citation:
Wayne M. Lawton, “Distribution of small values of Bohr almost periodic functions with bounded spectrum”, J. Sib. Fed. Univ. Math. Phys., 12:5 (2019), 571–578
Linking options:
https://www.mathnet.ru/eng/jsfu793 https://www.mathnet.ru/eng/jsfu/v12/i5/p571
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Abstract page: | 152 | Full-text PDF : | 47 | References: | 26 |
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