Abstract
When \(p>1\), using as base space classical Lorentz spaces associated to a weight from the Ariño–Muckenhoupt class \(B_p\), we will study Gagliardo–Nirenberg inequalities. As a by-product we will also consider Morrey–Sobolev inequalities. These arguments can be generalized to many different frameworks, in particular the proofs are given in the setting of stratified Lie groups.
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Notes
The lower bound \(N\ge 4\) corresponds to the homogeneous dimension of the Heisenberg group \(\mathbb {H}^1\), which is the simplest non-trivial stratified Lie group.
Which means that the Lie algebra generated by the family \({\textbf {X}}\) is \(\mathfrak {g}\).
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Acknowledgements
A part of this work was performed while the second and third authors visited the University of Evry Val d’Essonne. We express our gratitude to the Laboratoire de Mathématiques et Modélisation d’Evry (LaMME) of the University of Evry Val d’Essonne for the hospitality and excellent conditions.
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The second named author was partially supported by POSDRU/159/1.5/S/137750.
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Chamorro, D., Marcoci, AN. & Marcoci, LG. Functional Inequalities in Stratified Lie Groups with Sobolev, Besov, Lorentz and Morrey Spaces. Results Math 78, 219 (2023). https://doi.org/10.1007/s00025-023-01991-7
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DOI: https://doi.org/10.1007/s00025-023-01991-7
Keywords
- Improved Sobolev inequalities
- Sobolev spaces
- Besov spaces
- classical Lorentz spaces
- stratified Lie groups