Here we state a quantitative approximation theorem by means of nets of certain modified Hadamard integrals, using iterates of moment type operators, for functions f defined over the positive real semi-axis ]0, +∞[, having Mellin derivatives. The main tool is a suitable K-functional which is compatible with the structure of the multiplicative group ]0, +∞[. Some numerical examples and graphical representations are illustrated.
Bardaro, C., Faina, L., & Mantellini, I. (2015). Quantitative Approximation Properties for Iterates of Moment Operator. Mathematical Modelling and Analysis, 20(2), 261-272. https://doi.org/10.3846/13926292.2015.1021720
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