(,) mapping properties of convolution transforms
G. Sampson, A. Naparstek, V. Drobot (1976)
Studia Mathematica
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G. Sampson, A. Naparstek, V. Drobot (1976)
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Bartolomé Barceló (1986)
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Wolodymyr Madych (1974)
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Roger Jones (1999)
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We establish an exponential estimate for the relationship between the ergodic maximal function and the maximal operator associated with convolution powers of a probability measure.
Al-Bassam, M.A. (1966)
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R. J. Beerends (1988)
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Michał Wojciechowski (2000)
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An integral criterion for being an Fourier multiplier is proved. It is applied in particular to suitable regular functions which depend on the product of variables.
Przemysław Gadziński (2000)
Colloquium Mathematicae
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We study the densities of the semigroup generated by the operator on the 3-dimensional Heisenberg group. We show that the 7th derivatives of the densities have a jump discontinuity. Outside the plane x=0 the densities are . We give explicit spectral decomposition of images of in representations.
N. Ladhawala, D. Pankratz (1976)
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Ryotaro Sato (1987)
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