2018
DOI: 10.5802/afst.1569
|View full text |Cite
|
Sign up to set email alerts
|

Lower bounds for the Dyadic Hilbert transform

Abstract: In this paper, we seek lower bounds of the dyadic Hilbert transform (Haar shift) of the form Xf L 2 (K) ≥ C(I, K) f L 2 (I) where I and K are two dyadic intervals and f supported in I. If I ⊂ K such bounds exist while in the other cases K I and K ∩ I = ∅ such bounds are only available under additional constraints on the derivative of f . In the later case, we establish a bound of the form Xf L 2 (K) ≥ C(I, K)| f I | where f I is the mean of f over I. This sheds new light on the similar problem for the usual Hi… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1

Citation Types

0
1
0

Year Published

2019
2019
2021
2021

Publication Types

Select...
2

Relationship

1
1

Authors

Journals

citations
Cited by 2 publications
(1 citation statement)
references
References 17 publications
0
1
0
Order By: Relevance
“…The proof is far from stable (in the sense that it is not clear how to establish arguments of this type for more general integral operators). The problem seems to be completely open for general integral operators (we refer to [11] for sharp results for the Laplace transform and the Fourier transform and to [8] for a dyadic model). When dealing with the Hilbert transform, the identity Hf L 2 (R) = f L 2 (R) suggests a rephrasing of the question: how does the Hilbert transform move the L 2 −mass of a function around?…”
Section: Integral Operatorsmentioning
confidence: 99%
“…The proof is far from stable (in the sense that it is not clear how to establish arguments of this type for more general integral operators). The problem seems to be completely open for general integral operators (we refer to [11] for sharp results for the Laplace transform and the Fourier transform and to [8] for a dyadic model). When dealing with the Hilbert transform, the identity Hf L 2 (R) = f L 2 (R) suggests a rephrasing of the question: how does the Hilbert transform move the L 2 −mass of a function around?…”
Section: Integral Operatorsmentioning
confidence: 99%