The approximation and extension of uniformly continuous Banach space valued mappings
The best L2-approximation by finite sums of functions with separable variables.
The Boubaker polynomials expansion scheme BPES for solving a standard boundary value problem.
The Convergence Rates of Expansions in Jacobi Polynomials.
The fundamentality of sets of ridge functions.
The -variants of a prescribed sequence of orthogonal polynomials.
Tracking through singularities using sliding mode differentiators
In this work, an alternative solution to the tracking problem for a SISO nonlinear dynamical system exhibiting points of singularity is given. An inversion-based controller is synthesized using the Fliess generalized observability canonical form associated to the system. This form depends on the input and its derivatives. For this purpose, a robust exact differentiator is used for estimating the control derivatives signals with the aim of defining a control law depending on such control derivative...
Über die Ramanujan-Entwicklung multiplikativer Funktionen
Über ein Problem der Näherungsrechnung und die Makeham'schen Rentenwerte
Un procédé d'approximation d'une fonction convexe lipschitzienne et de ses singularités
Uniform approximation by incomplete polynomials.
Uniform approximation by polynomials on real non-degenerate Weil polyhedron.
Uniform approximation of continuous functions and -functions in nuclear spaces by entire functions
Uniform approximation of continuous functions on compact sets by biharmonic functions
We give a characterization of functions that are uniformly approximable on a compact subset of by biharmonic functions in neighborhoods of .
Universal approximation by hill functions
Universal approximation by systems of hill functions
Universal simultaneous approximations of the coefficient functionals
Universally optimal approximation of functionals
A universal optimal in order approximation of a general functional in the space of continuous periodic functions is constructed and its fundamental properties and some generalizations are investigated. As an application the approximation of singular integrals is considered and illustrated by numerical results.
Univerzální diferenciální rovnice (Věnováno památce Waltera Strodta)
Variationsmindernde Eigenschaften eines speziellen Kreinschen Kernes.