Besov spaces with positive smoothness on Rn, embeddings and growth envelopes

  • Authors:
  • Dorothee D. Haroske;Cornelia Schneider

  • Affiliations:
  • Mathematical Institute, Friedrich-Schiller-University Jena, D-07737 Jena, Germany;University Leipzig, PF 100920, D-04009 Leipzig, Germany

  • Venue:
  • Journal of Approximation Theory
  • Year:
  • 2009

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Abstract

We characterise Besov spaces with positive smoothness on R^n, obtained by different approaches. First we present two settings B"p","q^s(R^n), B"p","q^s(R^n) associated to definitions by differences and Fourier-analytical methods and give an equivalent characterisation in terms of subatomic decompositions for the spaces B"p","q^s. We study their connections and diversity, as well as embeddings between Besov spaces and into Lorentz spaces. Secondly, we determine their growth envelopes E"G(B"p","q^s(R^n)) for 00, and finally discuss some applications.