Abstract
It is proved that systems of exponentials orthogonal to measures of a special kind form bases in \(L^p ( - \pi ,\pi ),{\text{ }}1 < p < \infty \), for which an analog of the Riesz theorem on the projection from \(L^p {\text{ onto }}H^p \) is valid.
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Sedletskii, A.M. Bases of Exponentials in the Spaces \(L^p ( - \pi ,\pi ) \) . Mathematical Notes 72, 383–397 (2002). https://doi.org/10.1023/A:1020555522378
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DOI: https://doi.org/10.1023/A:1020555522378