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Journal of University of Chinese Academy of Sciences ›› 2024, Vol. 41 ›› Issue (1): 28-34.DOI: 10.7523/j.ucas.2021.0073

• Research Articles • Previous Articles     Next Articles

Continuity of the Lp-norm of the truncated Hardy-Littlewood maximal operator

WU Jia1, WEI Mingquan2, YAN Dunyan1   

  1. 1. School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    2. School of Mathematics and statistics, Xinyang Normal University, Xinyang 464000, Henan, China
  • Received:2021-09-27 Revised:2021-11-02 Online:2024-01-15
  • Supported by:
    the National Natural Science Foundation of China (11871452, 12071052), the Natural Science Foundation of Henan (202300410338), and the Nanhu Scholar Program for Young Scholars of XYNU

Abstract: This paper focuses on the continuity of Lp(Rn)→Lp(Rn)-norm of the truncated Hardy-Littlewood maximal operator Mba with two truncation parameters a and b. We first, respectively, present the left semi-continuity and right semicontinuity of ‖MbaLp(Rn)→Lp(Rn) with respect to θ=b/a, and then the continuity of ‖MbaLp(Rn)→Lp(Rn) is extended to infinity.

Key words: truncated maximal operator, continuity, Lp(Rn)→Lp(Rn)-norm

CLC Number: