ABOUT THE RELATIONSHIP BETWEEN GRAND AND SMALL LEBESQUE SPACES WITH CLASSIC SYMMETRICAL SPACES


Berezhnoi E.I.
April 2025Springer

Journal of Mathematical Sciences (United States)
2025#289Issue 6889 - 904 pp.

Based on the study of geometric properties of grand Lebesque space, we give an exact description of the mutual embeddings of grand Lebesgue spaces Lα0→(ζ) and classical Orlicz Lorentz and Marcinkiewicz spaces. It turns out that the grand Lebesgue space Lα0→(ζ) for α0∈(0,1) cannot be described as an Orlicz, Lorentz, and Marcinkiewicz space. We also show that the grand Lebesgue space Lα0→(ζ) for α0∈[0,1) is not reflexive. Using duality, we give similar results for small Lebesgue spaces Lα1←(ξ).

Banach ideal space , Grand Lebesque spaces , Reflexivity , Small Lebesque spaces , Symmetrical spaces

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Department of Mathematics, Yaroslavl State University, 14, Sovetskaya St., Yaroslavl, 150000, Russian Federation
Institute of Mathematics and Mathematical Modeling, Almaty, Kazakhstan
Regional Mathematical Center of Southern Federal University, 105/42 Bolshaya Sadovaya, Rostov-on-Don, 344090, Russian Federation

Department of Mathematics
Institute of Mathematics and Mathematical Modeling
Regional Mathematical Center of Southern Federal University

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