Almost-orthogonality of restricted haar functions

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2020-02

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en

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9
601-609

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Proceedings of the American Mathematical Society, Volume 148, issue 2

Abstract

We consider the Haar functions hI on dyadic intervals. We show that if p > 2 3 and E ⊂ [0, 1], then the set of all functions ∥hI1E∥-1 2 hI1E with |I ∩ E| ≥ p|I| is a Riesz sequence. For p ≤ 2 3 we provide a counterexample.

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Weigt , J 2020 , ' Almost-orthogonality of restricted haar functions ' , Proceedings of the American Mathematical Society , vol. 148 , no. 2 , pp. 601-609 . https://doi.org/10.1090/proc/14752