Sharp interpolation inequalities for discrete operators and applications

We consider interpolation inequalities for imbeddings of the l 2 -sequence spaces over d -dimensional lattices into the l 0 ∞ spaces written as interpolation inequality between the l 2 -norm of a sequence and its difference. A general method is developed for finding sharp constants, extremal element...

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Bibliographic Details
Published in:Bulletin of mathematical sciences 2015-04, Vol.5 (1), p.19-57
Main Authors: Ilyin, Alexei, Laptev, Ari, Zelik, Sergey
Format: Article
Language:English
Subjects:
Mathematics
Mathematics and Statistics
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Summary:We consider interpolation inequalities for imbeddings of the l 2 -sequence spaces over d -dimensional lattices into the l 0 ∞ spaces written as interpolation inequality between the l 2 -norm of a sequence and its difference. A general method is developed for finding sharp constants, extremal elements and correction terms in this type of inequalities. Applications to Carlson’s inequalities and spectral theory of discrete operators are given.
ISSN:1664-3607
1664-3615
DOI:10.1007/s13373-014-0060-8