Objective Function and Derivatives The input argument fun refers to an IML module that specifies a function that returns f, a vector of length m for least-squares subroutines or a scalar for other ...

For example, studies addressing the pre-Schwarzian and Schwarzian derivatives have established new criteria that enhance our ability to characterise the geometric behaviour of harmonic mappings [1].

This is a preview. Log in through your library . Founded in 1888, to further mathematical research and scholarship, the 30,000-member American Mathematical Society provides programs and services that ...

In a Banach space, we consider the nonlinear Langevin time-delay differential equations with ψ-Caputo fractional derivatives. Using weighted norms involving Mittag-Leffler functions, we obtain some ...