• Medientyp: E-Book; Bericht; Sonstige Veröffentlichung
  • Titel: Maximal convergence theorems for functions of squared modulus holomorphic type in R2 and various applications
  • Beteiligte: Kraus, Christiane [VerfasserIn]
  • Erschienen: Weierstrass Institute for Applied Analysis and Stochastics publication server, 2006
  • Sprache: Englisch
  • DOI: https://doi.org/10.20347/WIAS.PREPRINT.1175
  • Schlagwörter: Polynomial approximation in 2-space -- maximal convergence -- Bernstein-Walsh's type theorems -- real-analytic functions ; 41A17 ; 30C35 ; 41A10 ; 41A60 ; 30E10 ; article ; 41A63 ; 41A25
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  • Beschreibung: In this paper we extend the theory of maximal convergence introduced by Walsh to functions of squared modulus holomorphic type. We introduce in accordance to the well-known complex maximal convergence number for holomorphic functions a real maximal convergence number for functions of squared modulus holomorphic type and prove several maximal convergence theorems. We achieve that the real maximal convergence number for F is always greater or equal than the complex maximal convergence number for g and equality occurs if L is a closed disk in R^2. Among other various applications of the resulting approximation estimates we show that for functions F of squared holomorphic type which have no zeros in a closed disk B_r the relation $$ \limsup_{n \to \infty} \sqrt[n]{ E_n( B_r,F)} = \limsup_{n \to \infty} \sqrt[n]{E_n( { \partial B}_r,F)} $$ is valid, where E_n is the polynomial approximation error.
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