Sawyer’s duality principle for grand Lebesgue spaces. (English) Zbl 1421.46027
Summary: The aim of this paper is to extend Sawyer’s duality principle from the cone of decreasing functions of the Lebesgue space to the cone of decreasing functions of the grand Lebesgue space and to prove the boundedness of classical Hardy operators in the grand Lebesgue spaces.
MSC:
| 46E30 | Spaces of measurable functions (\(L^p\)-spaces, Orlicz spaces, Köthe function spaces, Lorentz spaces, rearrangement invariant spaces, ideal spaces, etc.) |
| 26D10 | Inequalities involving derivatives and differential and integral operators |
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