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Riesz–Kolmogorov Type Compactness Criteria in Function Spaces with Applications

In: Multivariable Operator Theory

Author

Listed:
  • Mishko Mitkovski

    (School of Mathematical and Statistical Sciences, Clemson University)

  • Cody B. Stockdale

    (School of Mathematical and Statistical Sciences, Clemson University)

  • Nathan A. Wagner

    (Washington University in St. Louis, Department of Mathematics and Statistics)

  • Brett D. Wick

    (Washington University in St. Louis, Department of Mathematics and Statistics)

Abstract

We present forms of the classical Riesz–Kolmogorov theorem for compactness that are applicable in a wide variety of settings. In particular, our theorems apply to classify the precompact subsets of the Lebesgue space $$L^2$$ L 2 , Paley–Wiener spaces, weighted Bargmann–Fock spaces, and a scale of weighted Besov–Sobolev spaces of holomorphic functions that includes weighted Bergman spaces of general domains as well as the Hardy space and the Dirichlet space. We apply the compactness criteria to characterize the compact Toeplitz operators on the Bergman space, deduce the compactness of Hankel operators on the Hardy space, and obtain general umbrella theorems.

Suggested Citation

  • Mishko Mitkovski & Cody B. Stockdale & Nathan A. Wagner & Brett D. Wick, 2023. "Riesz–Kolmogorov Type Compactness Criteria in Function Spaces with Applications," Springer Books, in: Ernst Albrecht & Raúl Curto & Michael Hartz & Mihai Putinar (ed.), Multivariable Operator Theory, pages 543-573, Springer.
    • Handle: RePEc:spr:sprchp:978-3-031-50535-5_22
    DOI: 10.1007/978-3-031-50535-5_22
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