On the Riesz energy of measures

  • Authors:
  • M. Götz

  • Affiliations:
  • Department of Mathematics, University of Eichstätt-Ingolstadt, Ostenstrasse 26, D-85071 Eichstätt, Germany

  • Venue:
  • Journal of Approximation Theory
  • Year:
  • 2003

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Abstract

Representations for the Riesz kernel | x-y | - s are presented, which lead to new interpretations of the energy of measures. It is shown that the surface measure on the unit sphere in R d solves a minimal energy problem independent of s (but intimately related to Riesz s -energy) and that n points on the unit circle with minimal discrete Riesz energy are n th roots of unity, unique up to rotation. Moreover, the energy of signed measures is estimated in terms of their discrepancy.