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math.CA2025

The multilinear fractional bounded mean oscillation operator theory I: sparse domination, sparse theorem, off-diagonal extrapolation, quantitative weighted estimate -- for generalized commutators

Xi Cen, Zichen Song

This paper introduces and studies a class of multilinear fractional bounded mean oscillation operators (denoted {\rm -FBMOOs}) defined on ball-basis measure spaces $(X, μ, \mat…

math.CA2025

The multilinear fractional sparse operator theory II: refining weighted estimates via multilinear fractional sparse forms

Xi Cen

This paper refines the main results from our previous study on sparse bounds of generalized commutators of multilinear fractional singular integral operators in \cite{CenSong2412}.…

math.CA2025

New fractional type weights and the boundedness of some operators

Xi Cen, Qianjun He, Zichen Song +1

Two classes of fractional type variable weights are established in this paper. The first kind of weights are variable multiple weights, which are…

math.CA2025

The multilinear fractional sparse operator theory I: pointwise domination and weighted estimate

Xi Cen, Zichen Song

How to establish some specific quantitative weighted estimates for the generalized commutator of multilinear fractional singular integral operator is the f…

math.CA2024

New variable weighted conditions for fractional maximal operators over spaces of homogeneous type

Xi Cen

Based on the rapid development of dyadic analysis and the theory of variable weighted function spaces over the spaces of homogeneous type in recent years, we systematica…

math.CA2024

Fractional maximal operators on weighted variable Lebesgue spaces over the spaces of homogeneous type

Xi Cen

Let is a space of homogeneous type, we establish a new class of fractional-type variable weights . Then, we get the new weighted strong-type a…