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New York Journal of Mathematics
Volume 32 (2026), 1105-1133

  

Shaoyong He, Lei Wang, and Yun Fan

Hardy-Littlewood maximal functions, Riesz transform, and their commutators in the Dunkl setting

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Published: June 27, 2026.
Keywords: Hardy-Littlewood maximal operator, Dunkl-Riesz transform, commutator, Lipschitz space.
Subject [2020]: Primary 42B35, 43A85, Secondary 42B25, 42B20.

Abstract
This paper investigates the boundedness of commutators associated with the Hardy-Littlewood maximal operator, the sharp maximal operator, and the Riesz transform in the Dunkl setting. We establish necessary and sufficient conditions for the boundedness of the commutators [b, Mα,κ] and [b, M#κ] on Orlicz spaces when the symbol function b belongs to a Lipschitz space, thereby obtaining new characterizations of nonnegative Lipschitz functions. Furthermore, we extend a classical result of Janson to the Dunkl framework by proving that the commutator of the Dunkl-Riesz transform, [b, Rj], is bounded from Lκp(Rd) to Lκq(Rd), where 1 < p < q < ∞ and 1/q = 1/p - β/N, if and only if the symbol b ∈ Lip(β).

Acknowledgements

The first author was supported by the National Natural Science Foundation of China (Grant No. 12301115) and the third author was supported by Zhejiang Provincial Natural Science Foundation of China (No. LZ24A010004).


Author information

Shaoyong He
Department of Mathematics
Huzhou Normal University
Huzhou 313000, China

hsyongmath@sina.com

Lei Wang
Department of Mathematics
Huzhou Normal University
Huzhou 313000, China

wanglei112025@163.com

Yun Fan
Department of Mathematics
Huzhou Normal University
Huzhou 313000, China

fanyun@huznu.edu.cn