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On the validity for frames of a result concerning orthogonal systems - MaRDI portal

On the validity for frames of a result concerning orthogonal systems (Q2387848)

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On the validity for frames of a result concerning orthogonal systems
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    On the validity for frames of a result concerning orthogonal systems (English)
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    5 September 2005
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    The authors generalize a previous work of theirs for an orthogonal basis in \(L^2(0,1)\). The result is a lower bound for \(n\)-term approximations with respect to frames of a general form of a family of functions. The authors point out that this is a natural form for applications -- particularly for non-orthogonal bases in applied problems of image compression.
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    non-orthogonal bases
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    separable Hilbert space
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    Riesz basis
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    canonical expansion in the frame system
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