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Weakly compact sets and weakly compact pointwise multipliers in Banach function lattices

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  • Karol Leśnik
  • Lech Maligranda
  • Jakub Tomaszewski

Abstract

We prove that the class of Banach function lattices in which all relatively weakly compact sets are equi‐integrable sets (i.e. spaces satisfying the Dunford–Pettis criterion) coincides with the class of 1‐disjointly homogeneous Banach lattices. New examples of such spaces are provided. Furthermore, it is shown that Dunford–Pettis criterion is equivalent to de la Valleé Poussin criterion in all rearrangement invariant spaces on the interval. Finally, the results are applied to characterize weakly compact pointwise multipliers between Banach function lattices.

Suggested Citation

  • Karol Leśnik & Lech Maligranda & Jakub Tomaszewski, 2022. "Weakly compact sets and weakly compact pointwise multipliers in Banach function lattices," Mathematische Nachrichten, Wiley Blackwell, vol. 295(3), pages 574-592, March.
    • Handle: RePEc:bla:mathna:v:295:y:2022:i:3:p:574-592
    DOI: 10.1002/mana.202000077
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