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Convergence to Zero of Exponential Sums with Positive Integer Coefficients and Approximation by Sums of Shifts of a Single Function on the Line

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We prove that there is a sequence of trigonometric polynomials with positive integer coefficients, which converges to zero almost everywhere. We also prove that there is a function f: ℝ… Click to show full abstract

We prove that there is a sequence of trigonometric polynomials with positive integer coefficients, which converges to zero almost everywhere. We also prove that there is a function f: ℝ → ℝ such that the sums of its shifts are dense in all real spaces Lp(ℝ) for 2 ≤ p < ∞ and also in the real space C0(R).

Keywords: convergence zero; sums shifts; integer coefficients; positive integer; function

Journal Title: Analysis Mathematica
Year Published: 2018

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