One of the most challenging aspects of nonsmooth analysis is to overcome nondifferentiability. A possible approach is to use the generalized notions of the classical gradient and directional ...

The electrical frequency is a parameter of great importance for the full operation of Electric Power Systems (EPS), influencing the operation of equipment and the quality of the energy supplied. This ...

Abstract In this paper, we define a functional optimization problem corresponding to smooth functions which its optimal solution is first derivative of these functions in a domain. These functional ...

When estimating derivatives of regression functions from noisy data, a number of additional problems arise compared with the estimation of the regression function itself. Linear methods, such as ...

Michael W. Botsko, A First Derivative Test for Functions of Several Variables, The American Mathematical Monthly, Vol. 93, No. 7 (Aug. - Sep., 1986), pp. 558-561 ...