Abstract
It is shown that every localized frame is a finite union of Riesz sequences. This is a partial solution to a question of Feichtinger.
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Gröchenig, K. Localized Frames Are Finite Unions of Riesz Sequences. Advances in Computational Mathematics 18, 149–157 (2003). https://doi.org/10.1023/A:1021368609918
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DOI: https://doi.org/10.1023/A:1021368609918