A twosided linear estimate and a dyadic reduction of the UMD Conjecture

Fuente: arXiv
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Main Authors: Domelevo, Komla, Petermichl, Stefanie
Format: Preprint
Published: 2026
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author Domelevo, Komla
Petermichl, Stefanie
author_facet Domelevo, Komla
Petermichl, Stefanie
contents We define a time faithful dyadic shift operator of complexity one, that is an antisymmetric antiinvolution. We show that the Hilbert transform with values in a Banach space is $L^p$ bounded if and only if the dyadic shift is -- with a linear two sided norm dependence. The results reduce the famous UMD conjecture to a pair of simple dyadic operators.
format Preprint
id arxiv_https___arxiv_org_abs_2604_11273
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle A twosided linear estimate and a dyadic reduction of the UMD Conjecture
Domelevo, Komla
Petermichl, Stefanie
Functional Analysis
Probability
46B20 (Primary) 60G42, 60G44, 65C30 (Secondary)
We define a time faithful dyadic shift operator of complexity one, that is an antisymmetric antiinvolution. We show that the Hilbert transform with values in a Banach space is $L^p$ bounded if and only if the dyadic shift is -- with a linear two sided norm dependence. The results reduce the famous UMD conjecture to a pair of simple dyadic operators.
title A twosided linear estimate and a dyadic reduction of the UMD Conjecture
topic Functional Analysis
Probability
46B20 (Primary) 60G42, 60G44, 65C30 (Secondary)
url https://arxiv.org/abs/2604.11273