Acta mathematica scientia,Series A ›› 2023, Vol. 43 ›› Issue (4): 1024-1036.

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Pointwise Estimate of Fractional Maximal Singular Integral Commutators and its Application

Yang Xuechun(),Li Baode*()   

  1. College of Mathematics and System Science, Xinjiang University, Urumqi 830017
  • Received:2022-08-08 Revised:2022-11-05 Online:2023-08-26 Published:2023-07-03
  • Contact: Baode Li E-mail:2760978447@qq.com;baodeli@xju.edu.cn
  • Supported by:
    NSFC(12261083);NSFC(12161083);Natural Science Foundation of Xinjiang Uyghur Autonomous Region(2020D01C048)

Abstract:

In this paper, we introduce a class of fractional maximal singular integral commutators related to variable Lipschitz functions, which is a generalization of $BMO$ functions and classical Lipschitz functions. Then we obtain a pointwise estimate of this commutator. As an application, we obtain the boundedness of this commutator in variable Lebesgue spaces. The above results are also new even in the constant exponent context.

Key words: Lipschitz function, Fractional singular integral, Commutator

CLC Number: 

  • O174.1
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