数学物理学报(英文版) ›› 2025, Vol. 45 ›› Issue (3): 809-824.doi: 10.1007/s10473-025-0304-6

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COMPACT LINEAR COMBINATIONS OF COMPOSITION OPERATORS ON THE UNIT BALL

Chunyu DONG1, Xin GUO2,†, Qijian KANG3   

  1. 1. School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China;
    2. School of Statistics and Mathematics, Zhongnan University of Economics and Law, Wuhan 430073, China;
    3. School of Mathematics and Statistics, Lingnan Normal University, Zhanjiang 524048, China
  • 收稿日期:2023-08-23 修回日期:2024-05-23 出版日期:2025-05-25 发布日期:2025-09-30

COMPACT LINEAR COMBINATIONS OF COMPOSITION OPERATORS ON THE UNIT BALL

Chunyu DONG1, Xin GUO2,†, Qijian KANG3   

  1. 1. School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China;
    2. School of Statistics and Mathematics, Zhongnan University of Economics and Law, Wuhan 430073, China;
    3. School of Mathematics and Statistics, Lingnan Normal University, Zhanjiang 524048, China
  • Received:2023-08-23 Revised:2024-05-23 Online:2025-05-25 Published:2025-09-30
  • Contact: Xin GUO, E-mail: xguo.math@zuel.edu.cn
  • About author:Chunyu DONG, E-mail: dongchunyu math@whu.edu.cn; Qijian KANG, E-mail: qjkang.math@whu.edu.cn
  • Supported by:
    National Science Foundations of China (Grant No. 11771340, 12171373).

摘要: Recently, Choe-Koo-Wang (J Funct Anal, 2020, 278: 108393) demonstrated the rigid phenomenon: The compact linear combination of composition operators under the Coefficient Non-cancellation Condition(CNC), implies that each difference is compact on the weighted Bergman space in the unit disk. Motivated by the subtle connection of composition operator theory on the weighted Bergman spaces, Korenblum spaces and bounded holomorphic function spaces, we first explore the rigid phenomenon which also holds on the Korenblum space over the unit ball. Furthermore, we discuss which difference of composition operators is compact when the compact combination of composition operators does not satisfy the condition (CNC) on Korenblum spaces and bounded holomorphic function spaces over the unit ball setting.

关键词: composition operator, linear combination, compact operator, weighted Bergman space, Korenblum space

Abstract: Recently, Choe-Koo-Wang (J Funct Anal, 2020, 278: 108393) demonstrated the rigid phenomenon: The compact linear combination of composition operators under the Coefficient Non-cancellation Condition(CNC), implies that each difference is compact on the weighted Bergman space in the unit disk. Motivated by the subtle connection of composition operator theory on the weighted Bergman spaces, Korenblum spaces and bounded holomorphic function spaces, we first explore the rigid phenomenon which also holds on the Korenblum space over the unit ball. Furthermore, we discuss which difference of composition operators is compact when the compact combination of composition operators does not satisfy the condition (CNC) on Korenblum spaces and bounded holomorphic function spaces over the unit ball setting.

Key words: composition operator, linear combination, compact operator, weighted Bergman space, Korenblum space

中图分类号: 

  • 32A35