Weakly compact sets and weakly compact pointwise multipliers in Banach function lattices
[ 1 ] Instytut Matematyki, Wydział Automatyki, Robotyki i Elektrotechniki, Politechnika Poznańska | [ P ] employee
2022
scientific article
english
- Banach function spaces
- Orlicz spaces
- pointwise multipliers
- rearrangement invariant spaces
- weakly compact sets
EN 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.
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