Approximation problems in modular spaces of double sequences

• Autores: Aleksander Waszak
• Localización: Publicacions matematiques, ISSN 0214-1493, Vol. 34, Nº 2, 1990, págs. 259-268
• Idioma: inglés
• Títulos paralelos:
  • Problemas de aproximación en espacios modulares de sucesiones dobles
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• Resumen

  • Let X denote the space of all real, bounded double sequences, and let F, f, G be f-functions. Moreover, let ? be an increasing, continuous function for u = 0 such that ?(0) = 0.

    In this paper we consider some spaces of double sequences provided with two-modular structure given by generalized variations and the translation operator (...).