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    • A note on Lanczos generalized derivative 

      López Bonilla, José Luis; Iturri-Hinojosa, Alejandro; Bucur, Amelia (Venezuela, 2010-11-02)
      Lanczos introduced an integral expression for calculating the derivative of a function, if this is continuous in the point x under analysis. Here we extend this expression to the case of a finite discontinuity at x.