Abstract
The question of the representability of a continuous function on \(\mathbb R^d\) in the form of the Fourier integral of a finite Borel complex-valued measure on \(\mathbb R^d\) is reduced in this article to the same question for a simple function. This simple function is determined by the values of the given function on the integer lattice \(\mathbb R^d\). For \(d=1\), this result is already known: it is an inscribed polygonal line. The article also describes applications of the obtained theorems to multiple trigonometric Fourier series.
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Translated from Matematicheskie Zametki, 2021, Vol. 110, pp. 766–772 https://doi.org/10.4213/mzm13178.
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Trigub, R.M. On Fourier Series on the Torus and Fourier Transforms. Math Notes 110, 767–772 (2021). https://doi.org/10.1134/S0001434621110134
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DOI: https://doi.org/10.1134/S0001434621110134