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    • A characterization of structural nikol'skiî- besov spaces using fractional derivatives 

      Enríquez, Francisco; Montes, Alex; Pérez, Jhon
      The Nikol'skiî-Besov spaces Bapq(Rn), 1 0, are defined in terms of modulus of continuity and they are characterized using the partial derivatives of the Poisson integrals. In this work we show a characterizationof the ...
      Universidad Nacional de Colombia Revistas electrónicas UN Boletín de Matemáticas.