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Tractable embeddings of Besov spaces into Zygmund spaces, II

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EN
The paper deals with dimension-controllable (tractable) embeddings of Besov spaces on n-dimensional cubes into Zygmund spaces.
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Tractable embeddings of Besov spaces into Zygmund spaces

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The paper deals with dimension-controllable (tractable) embeddings of Besov spaces on n-dimensional cubes into Zygmund spaces. This can be expressed in terms of tractability envelopes.
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Sobolev-Besov spaces of measurable functions

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EN
The paper deals with spaces $L^{s}_{p}(ℝⁿ)$ of Sobolev type where s > 0, 0 < p ≤ ∞, and their relations to corresponding spaces $B^{s}_{p,q}({ℝ}ⁿ)$ of Besov type where s > 0, 0 < p ≤ ∞, 0 < q ≤ ∞, in terms of embedding and real interpolation.
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A localization property for $B^{s}_{pq}$ and $F^{s}_{pq}$ spaces

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Let $f^{j} = ∑_{k} a_{k} f(2^{j+1}x - 2k)$, where the sum is taken over the lattice of all points k in $ℝ^n$ having integer-valued components, j∈ℕ and $a_k ∈ ℂ$. Let $A^{s}_{pq}$ be either $B^{s}_{pq}$ or $F^{s}_{pq}$ (s ∈ ℝ, 0 < p < ∞, 0 < q ≤ ∞) on $ℝ^n.$ The aim of the paper is to clarify under what conditions $∥f^{j} | A^{s}_{pq}∥$ is equivalent to $2^{j(s-n/p)} (∑_{k} |a_k|^p)^{1/p} ∥f | A^{s}_{pq}∥$.
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Wavelet frames for distributions; local and pointwise regularity

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This paper deals with wavelet frames for a large class of distributions on euclidean n-space, including all compactly supported distributions. These representations characterize the global, local, and pointwise regularity of the distribution considered.
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Some spaces \(\ensuremath{A^s_{p,q}} (\rn)\) with \(A = \{ B,F \}\), \(s\in \real\), \(0
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The paper deals with quarkonial decompositions and entropy numbers in weighted function spaces on hyperbolic manifolds. We use these results to develop a spectral theory of related Schrödinger operators in these hyperbolic worlds.
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A note on wavelet bases in function spaces

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Local means and wavelets in function spaces

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EN
The paper deals with local means and wavelet bases in weighted and unweighted function spaces of type $B^s_{pq}$ and $F^s_{pq}$ on ℝⁿ and on 𝕋ⁿ.
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Let Γ be a closed set in $ℝ^n$ with Lebesgue measure |Γ| = 0. The first aim of the paper is to give a Fourier analytical characterization of Hausdorff dimension of Γ. Let 0 < d < n. If there exist a Borel measure µ with supp µ ⊂ Γ and constants $c_{1} > 0$ and $c_{2} > 0$ such that $c_{1}r^{d} ≤ µ (B(x,r)) ≤ c_{2}r^{d}$ for all 0 < r < 1 and all x ∈ Γ, where B(x,r) is a ball with centre x and radius r, then Γ is called a d-set. The second aim of the paper is to provide a link between the related Lebesgue spaces $L_{p}(Γ)$, 0 < p ≤ ∞, with respect to that measure µ on the hand and the Fourier analytically defined Besov spaces $B^s_{p,q}(ℝ^n)$ (s ∈ ℝ, 0 < p ≤ ∞, 0 < q ≤ ∞) on the other hand.
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A multiplier in Besov spaces which is not a multiplier in Lebesgue spaces

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Interpolationstheorie für Banachideale von beschränkten linearen Operatoren

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On a class of weighted function spaces and related pseudodifferential operators

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Nukleare Funktionenräume und singuläre elliptische Differentialoperatoren

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Studia Mathematica
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1970
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tom 38
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nr 1
285-311
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Multipliers and Unconditional Schauder bases in Besov spaces

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Studia Mathematica
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1977
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tom 60
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nr 2
145-156
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