Approximation in metric linear spaces
Approximation in weighted generalized grand Lebesgue spaces
The direct and inverse problems of approximation theory in the subspace of weighted generalized grand Lebesgue spaces of 2π-periodic functions with the weights satisfying Muckenhoupt's condition are investigated. Appropriate direct and inverse theorems are proved. As a corollary some results on constructive characterization problems in generalized Lipschitz classes are presented.
Approximation of a function by Kantorovich type operators
Approximation of almost periodic functions by convolution type operators.
Approximation of almost periodic functions by periodic ones
It is not the purpose of this paper to construct approximations but to establish a class of almost periodic functions which can be approximated, with an arbitrarily prescribed accuracy, by continuous periodic functions uniformly on .
Approximation of an elliptic boundary value problem with unilateral constraints
Approximation of -Continuous and -Differentiable functions by GBS operators of Bernstein bivariate polynomials.
Approximation of -continuous and -differentiable functions by GBS operators defined by infinite sum.
Approximation of bounded variation functions by a Bézier variant of the Bleimann, Butzer, and Hahn operators.
Approximation of continuous convex-cone-valued functions by monotone operators
In this paper we study the approximation of continuous functions F, defined on a compact Hausdorff space S, whose values F(t), for each t in S, are convex subsets of a normed space E. Both quantitative estimates (in the Hausdorff semimetric) and Bohman-Korovkin type approximation theorems for sequences of monotone operators are obtained.
Approximation Of Continuous Functions By Monotone Sequences Of Polynomials With Integral Coefficients
Approximation of Continuous Functions by Monotone Sequences of Polynomials with Restricted Coefficients
Approximation of continuous functions by monotone sequences of generalized polynomials with restricted coefficients.
Approximation of Differentiable Functions on a Hilbert Space. III.
Approximation of Distribution Spaces by Means of Kernel Operators.
Approximation of domains with Lipschitzian boundary
Approximation of double coset spaces
Approximation of functions from by general linear operators of their Fourier series
We show the general and precise conditions on the functions and modulus of continuity as well as on the entries of matrices generating the summability means and give the rates of approximation of functions from the generalized integral Lipschitz classes by double matrix means of their Fourier series. Consequently, we give some results on norm approximation. Thus we essentially extend and improve our earlier results [Acta Comment. Univ. Tartu. Math. 13 (2009), 11-24] and the result of S. Lal [Appl....
Approximation of functions of two variables by some linear positive operators.
Approximation of functions of two variables by some operators in weighted spaces