Nonlinear wavelet approximation in anisotropic Besov spaces

Nonlinear wavelet approximation in anisotropic Besov spaces
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各向异性贝索夫空间中的非线性小波逼近

DOI:
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发表时间:
2003
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通讯作者:
Christopher John Leisner
Christopher John Leisner
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文献类型:
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作者:
Christopher John Leisner

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给定各向异性小波分解与平滑度相关的β, β = (β 1,…,β d),β 1,…在各向异性Besov空间B β中,我们给出了函数f∈B β对L p -范数,1≤p <∞的非线性逼近率。我们还证明了在函数f E B β的一般各向异性小波分解中,与β相关的各向异性小波分解给出了f的小波分解的最佳压缩率。
Given anisotropic wavelet decompositions associated with the smoothness β, β = (β 1 ,...,β d ),β 1 ,...,β d > 0 of multivariate functions as measured in anisotropic Besov spaces B β , we give the rate of nonlinear approximation with respect to the L p -norm, 1 ≤ p < ∞, of functions f ∈ B β by these wavelets. We also prove that, among a general class of anisotropic wavelet decompositions of a function f E B β , the anisotropic wavelet decomposition associated with β gives the optimal rate of compression of the wavelet decomposition of f.