Best constants of harmonic approximation on classes associated with the Laplace operator

• Autores: Michael I. Ganzburg
• Localización: Journal of approximation theory, ISSN 0021-9045, Vol. 150, Nº 2, 2008, págs. 199-213
• Idioma: inglés
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• Resumen

  • We compute the best constants of approximation by entire functions of spherical type and by trigonometric polynomials of spherical degree on classes of functions f satisfying the condition ?kfLp1, where p=1 or 2 and ? is the Laplace operator.