Net spaces on lattices, Hardy-Littlewood type inequalities, and their converses

Abstract

We introduce abstract net spaces on directed sets and prove their embedding and interpolation properties. Typical examples of interest are lattices of irreducible unitary representations of compact Lie groups and of class I representations with respect to a subgroup. As an application, we prove Hardy-Littlewood type inequalities and their converses on compact Lie groups and on compact homogeneous manifolds.

20 pages. arXiv admin note: text overlap with arXiv:1504.07043

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