Mesures orthogonales à support compact de longueur finie et applications

  • Tien-Cuong Dinh
Conference paper
Part of the Progress in Mathematics book series (PM, volume 188)

Keywords

Nous Allons Polynomial Hull Finite Linear Measure Strictement Pseudoconvexe Nous Construisons 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

On dit qu’une mesure μ dans \( {\mathbb{C}^n} \) est orthogonale si elle est orthogonale aux polynômes, c.-à-d. \( \smallint \) P(z)dg(z) =0 pour tout polynôme P. L’étude des mesures orthogonales (resp. orthogonales aux fonctions rationnelles) est en liaison directe avec le problème d’approximation polynomiale (resp. rationnelle). L’absence de mesure orthogonale (resp. orthogonale aux fonctions rationnelles) non nulle à support dans un compact γ implique que toute fonction continue dans γ à valeurs complexes est approximable uniformement sur γ par des polynômes (resp. par des fonctions rationnelles) et réciproquement.

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Copyright information

© Springer Basel AG 2000

Authors and Affiliations

  • Tien-Cuong Dinh
    • 1
  1. 1.Mathématique-Bâtiment 425Université Paris-SudOrsay CedexFrance

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