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Embeddings of harmonic mixed norm spaces on smoothly bounded domains in ℝn

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Abstract The main result of this paper is the embedding Bβs,r(Ω)↪Bβ+(n−1)(1s−1s1)s1,r1(Ω), $$\begin{array}{} \displaystyle \mathcal{B}^{s,r}_\beta({\it\Omega})\hookrightarrow \mathcal{B}^{s_1,r_1}_{\beta+(n-1)\big(\frac 1s-\frac 1{s_1}\big)}({\it\Omega}), \end{array}$$ 0 < r ≤ r1 ≤ ∞, 0 < s ≤ s1… Click to show full abstract

Abstract The main result of this paper is the embedding Bβs,r(Ω)↪Bβ+(n−1)(1s−1s1)s1,r1(Ω), $$\begin{array}{} \displaystyle \mathcal{B}^{s,r}_\beta({\it\Omega})\hookrightarrow \mathcal{B}^{s_1,r_1}_{\beta+(n-1)\big(\frac 1s-\frac 1{s_1}\big)}({\it\Omega}), \end{array}$$ 0 < r ≤ r1 ≤ ∞, 0 < s ≤ s1 ≤ ∞, β > –1, of harmonic functions mixed norm spaces on a smoothly bounded domain Ω ⊂ ℝn. We also extend a result on boundedness, in mixed norm, of a maximal function-type operator from the case of the unit disc and the unit ball to general domains in ℝn.

Keywords: smoothly bounded; embeddings harmonic; mixed norm; spaces smoothly; norm spaces

Journal Title: Open Mathematics
Year Published: 2019

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