Derivatives of Fourier series and integrals
Richard Wheeden (1966)
Studia Mathematica
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Richard Wheeden (1966)
Studia Mathematica
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A. Calderón, Antoni Zygmund (1954)
Studia Mathematica
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K. Hofmann, F. Wright (1963)
Fundamenta Mathematicae
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Richard Rochberg (1974)
Studia Mathematica
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J. Ligęza (1977)
Annales Polonici Mathematici
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G. J. Butler (1974)
Annales Polonici Mathematici
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Stanisław Sędziwy (1972)
Annales Polonici Mathematici
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Sundaram Thangavelu (1995)
Annales de l'institut Fourier
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We show that when is a mean periodic function of tempered growth on the reduced Heisenberg group then the closed translation and rotation invariant subspace generated by contains an elementary spherical function. Using a Paley-Wiener theorem for the Fourier-Weyl transform we formulate a conjecture for arbitrary mean periodic functions.
Makay, Géza (2000)
Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
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G. J. Butler, H. I. Freedman (1979)
Annales Polonici Mathematici
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Fabio Zanolin (1981)
Rendiconti del Seminario Matematico della Università di Padova
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Radosław Pietkun (2010)
Bulletin of the Polish Academy of Sciences. Mathematics
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The existence of a continuous periodic and almost periodic solutions of the nonlinear integral inclusion is established by means of the generalized Schauder fixed point theorem.