Robuta

https://eudml.org/doc/130602 EuDML | Approximation of -continuous and -differentiable functions by GBS operators defined by... differentiable functions approximation continuous https://numbas.mathcentre.ac.uk/exam/1872/mathcentre-maxima-and-minima-for-differentiable-fu/ mathcentre: Maxima and minima for differentiable functions on intervals - Numbas at mathcentre.ac.uk