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  • Research Article
  • Open Access

Extensions of Hardy inequality

Journal of Inequalities and Applications20062006:69379

  • Received: 2 May 2006
  • Accepted: 13 August 2006
  • Published:


We study extended Hardy inequalities using Littlewood-Paley theory and nonlinear estimates' method in Besov spaces. Our results improve and extend the well-known results of Cazenave (2003).


  • Besov Space
  • Nonlinear Estimate
  • Hardy Inequality


Authors’ Affiliations

The Graduate School of China Academy of Engineering Physics, P.O. Box 2101, Beijing, 100088, China


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© Junyong Zhang 2006

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.