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Convex body domination for a class of multi-scale operators

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arxiv 2311.10442 v1 pith:ICXL6XJI submitted 2023-11-17 math.FA math.CA

classification math.FAmath.CA
keywords dominationoperatorsbodyconvexsparseclassmatrix-weightedmulti-scale
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The technique of sparse domination, i.e., dominating operators with sums of averages taken over sparsely distributed cubes, has seen rapid development recently within the realms of harmonic analysis. A useful extension of sparse domination called convex body domination allows one to estimate operators in matrix-weighted spaces. In this paper, we extend recent sparse domination results for a class of multi-scale operators due to Beltran, Roos and Seeger to the convex body setting and prove that this implies quantitative matrix-weighted norm bounds for these operators and their commutators.

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  1. Besov--Triebel--Lizorkin-Type Spaces with Matrix $A_\infty$ Weights

    math.FA 2025-01 conditional novelty 7.0 of 10

    Matrix A-infinity weighted Besov and Triebel-Lizorkin type spaces are characterized via phi-transforms, molecules, wavelets, and atoms, with sharp boundedness conditions for almost diagonal and classical operators.

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