Asymptotic formulas for solutions of the equation
Miloš Ráb (1974)
Archivum Mathematicum
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Miloš Ráb (1974)
Archivum Mathematicum
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Y. Dupain, Vera Sós (1980)
Acta Arithmetica
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L. Włodarski (1963)
Colloquium Mathematicae
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P. L. Ganguli, Benoy Kumar Lahiri (1968)
Czechoslovak Mathematical Journal
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G. Sampson (1993)
Studia Mathematica
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We consider operators of the form with Ω(y,u) = K(y,u)h(y-u), where K is a Calderón-Zygmund kernel and (see (0.1) and (0.2)). We give necessary and sufficient conditions for such operators to map the Besov space (= B) into itself. In particular, all operators with , a > 0, a ≠ 1, map B into itself.