About an old problem of Karamata.
About approximation of B-continuous functions of three variables by GBS operators of Bernstein type on a tetrahedron.
About Fejér's sum.
About some bivariate operators of Stancu type.
About some linear operators.
About some linear operators defined by infinite sums.
About some properties of intermediate point in certain mean-value formulas.
About the bivariate operators of Kantorovich type.
About The Fundamental Matrix Of The Linear Nonstationary System
Abschätzungen linearer Durchmesser in Sobolev- und Besov-Räumen.
Absolute Monotonicity of Rational Functions Occurring in the Numerical Solution of Initial Value Problems.
Abstract analysis of Korovkin approximation theory [Abstract of thesis]
Abstract Korovkin type theorems on modular spaces by -summability
Our aim is to change classical test functions of Korovkin theorem on modular spaces by using -summability.
Abstract Korovkin-type theorems in modular spaces and applications
We prove some versions of abstract Korovkin-type theorems in modular function spaces, with respect to filter convergence for linear positive operators, by considering several kinds of test functions. We give some results with respect to an axiomatic convergence, including almost convergence. An extension to non positive operators is also studied. Finally, we give some examples and applications to moment and bivariate Kantorovich-type operators, showing that our results are proper extensions of the...
Accelerating the Convergence of a Table with Multiple Entry
Accelerating the Convergence of Power Series of Certain Entire Functions.
Accretive metric projections.
Accuracy of Several Multidimensional Refinable Distributions.
Adaptive convex optimization in Banach spaces: a multilevel approach
This is mainly a review paper, concerned with some applications of the concept of Nonlinear Approximation to adaptive convex minimization. At first, we recall the basic ideas and we compare linear to nonlinear approximation for three relevant families of bases used in practice: Fourier bases, finite element bases, wavelet bases. Next, we show how nonlinear approximation can be used to design rigorously justified and optimally efficient adaptive methods to solve abstract minimization problems in...
Adaptive methods of numerical quadrature [Abstract of thesis]