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Revista Matemática Complutense

, Volume 32, Issue 2, pp 365–393 | Cite as

Symmetries on manifolds: generalizations of the radial lemma of Strauss

  • Nadine Grosse
  • Cornelia SchneiderEmail author
Article
  • 80 Downloads

Abstract

For a compact subgroup G of the group of isometries acting on a Riemannian manifold M we investigate subspaces of Besov and Triebel–Lizorkin type which are invariant with respect to the group action. Our main aim is to extend the classical Strauss lemma under suitable assumptions on the Riemannian manifold by proving that G-invariance of functions implies certain decay properties and better local smoothness. As an application we obtain inequalities of Caffarelli–Kohn–Nirenberg type for G-invariant functions. Our results generalize those obtained in Skrzypczak (Rev Mat Iberoam 18:267–299, 2002). The main tool in our investigations are atomic decompositions adapted to the G-action in combination with trace theorems.

Keywords

Symmetries on manifolds Besov and Triebel–Lizorkin spaces Sobolev spaces Atomic decompositions 

Mathematics Subject Classification

46E35 53C20 

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Copyright information

© Universidad Complutense de Madrid 2018

Authors and Affiliations

  1. 1.Mathematical InstituteUniversity of FreiburgFreiburgGermany
  2. 2.Applied Mathematics IIIUniversity of Erlangen-NurembergErlangenGermany

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