Acta mathematica scientia,Series B ›› 2024, Vol. 44 ›› Issue (1): 173-188.doi: 10.1007/s10473-024-0109-z

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SOME PROPERTIES OF THE INTEGRATION OPERATORS ON THE SPACES F(p,q,s)*

Jiale Chen   

  1. School of Mathematics and Statistics, Shaanxi Normal University, Xi'an 710119, China
  • Received:2022-10-08 Revised:2023-07-13 Online:2024-02-25 Published:2024-02-27
  • About author:Jiale Chen, E-mail: jialechen@snnu.edu.cn
  • Supported by:
    Fundamental Research Funds for the Central Universities (GK202207018) of China.

Abstract: We study the closed range property and the strict singularity of integration operators acting on the spaces F(p,pα2,s). We completely characterize the closed range property of the Volterra companion operator Ig on F(p,pα2,s), which generalizes the existing results and answers a question raised in [A. Anderson, Integral Equations Operator Theory, 69 (2011), no. 1, 87-99]. For the Volterra operator Jg, we show that, for 0<α1, Jg never has a closed range on F(p,pα2,s). We then prove that the notions of compactness, weak compactness and strict singularity coincide in the case of Jg acting on F(p,p2,s).

Key words: integration operator, closed range property, strict singularity

CLC Number: 

  • 47G10
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