On the summability of double Fourier series
J. Marcinkiewicz, Antoni Zygmund (1939)
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J. Marcinkiewicz, Antoni Zygmund (1939)
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Chao-Ping Chang (1967)
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We study different conditions on the set of roots of the Fourier transform of a measure on the Euclidean space, which yield that the measure is absolutely continuous with respect to the Lebesgue measure. We construct a monotone sequence in the real line with this property. We construct a closed subset of which contains a lot of lines of some fixed direction, with the property that every measure with spectrum contained in this set is absolutely continuous. We also give examples of sets...
Daniel Waterman (1976)
Studia Mathematica
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