http://www.saber.ula.ve/handle/123456789/31721 2010 2026-05-01T02:51:13Z http://www.saber.ula.ve/handle/123456789/31723 A note on Lanczos generalized derivative López Bonilla, José Luis; Iturri-Hinojosa, Alejandro; Bucur, Amelia 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. 2010-11-02T19:41:21Z