An improved upper bound on the Lebesgue constant of Berrut�s rational interpolation operator

• Autores: Ren-Jiang Zhang
• Localización: Journal of computational and applied mathematics, ISSN 0377-0427, Vol. 255, Nº 1, 2014, págs. 652-660
• Idioma: inglés
• DOI: 10.1016/j.cam.2013.06.030
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• Resumen

  • In approximation theory, the Lebesgue constant of an interpolation operator plays an important role. The Lebesgue constant of Berrut�s interpolation operator has been studied recently. In the present work, an improved upper bound for equidistant nodes is given.