Functional characterization of best and good approximation in normed product spaces

• Autores: Manuel Fernández García-Hierro, Carlos Benítez Rodríguez
• Localización: Extracta mathematicae, ISSN-e 0213-8743, Vol. 2, Nº 3, 1987, págs. 114-116
• Idioma: inglés
• Títulos paralelos:
  • Caracterización funcional de aproximación buena y mejor en espacios producto normados
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• Resumen

  • In [6], C. Dierick deals with a small but important collection of norms in the product of a finite number of normed linear spaces and he extends to such products some results on functional characterization of best approximations. In this paper we establish the widest scope in which the mentioned results remain valid.