4.6 Article

Inversion positivity and the sharp Hardy-Littlewood-Sobolev inequality

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Publisher

SPRINGER
DOI: 10.1007/s00526-009-0302-x

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Funding

  1. DFG [FR 2664/1-1]
  2. U.S. NSF [PHY 0652854]

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We give a new proof of certain cases of the sharp HLS inequality. Instead of symmetric decreasing rearrangement it uses the reflection positivity of inversions in spheres. In doing this we extend a characterization of the minimizing functions due to Li and Zhu.

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