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Fractional integro-dierentiation in harmonic mixed norm spaces on a half-space

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K.L. Avetisyan

Fractional integro-dierentiation in harmonic mixed norm spaces on a half-space

Comment.Math.Univ.Carolinae 42,4 (2001) 691-709.

Abstract: In this paper some embedding theorems related to fractional integration and differentiation in harmonic mixed norm spacesh(p, q, α) on the half-space are established. We prove that mixed norm is equivalent to a “fractional derivative norm” and that harmonic conjugation is bounded in h(p, q, α) for the range 0<

p≤ ∞, 0< q≤ ∞. As an application of the above, we give a characterization of h(p, q, α) by means of an integral representation with the use of Besov spaces.

Keywords: embedding theorems, integral representations, conjugation, projec- tions

AMS Subject Classification: Primary 31B05; Secondary 31B10, 26A33

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