Results 21 to 30 of about 229 (177)
Shepard operator of least squares thin-plate spline type [PDF]
, 2021 We obtain some new Shepard type operators based on the classical, the modified Shepard methods and the least squares thin-plate spline function. Given some sets of points, we compute some representative subsets of knot points following an algorithm ...
CĂTINAȘ, Teodora, MALINA, Andra
core +2 more sources
Strang‐Fix theory for approximation order in weighted Lp‐spaces and Herz spaces
Journal of Function Spaces, Volume 4, Issue 1, Page 7-24, 2006., 2006 In this paper, we study the Strang‐Fix theory for approximation order in the weighted Lp ‐spaces and Herz spaces.
Naohito Tomita, Hans G. Feichtinger
wiley +1 more source
International Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 9, Page 459-468, 2004., 2004 We consider a Bézier‐Durrmeyer integral variant of the Baskakov operators and study the rate of convergence for functions of bounded variation.
Vijay Gupta, Ulrich Abel
wiley +1 more source
A strong converse inequality for the iterated Boolean sums of the Bernstein operator [PDF]
, 2022 We establish a two-term strong converse estimate of the rate of approximation by the iterated Boolean sums of the Bernstein operator. The characterization is stated in terms of appropriate moduli of smoothness or K-functionals.
DRAGANOV, Borislav R.
core +2 more sources
On simultaneous approximation for some modified Bernstein‐type operators
International Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 71, Page 3951-3958, 2004., 2004 We study the simultaneous approximation for a certain variant of Bernstein‐type operators.
Vijay Gupta, Nurhayat Ispir
wiley +1 more source
A new approach to nonlinear singular integral operators depending on three parameters
Open Mathematics, 2016 In this paper, we present some theorems on weighted approximation by two dimensional nonlinear singular integral operators in the following form: Tλ(f;x,y)=∬R2Kλ(t−x,s−y,f(t,s))dsdt,(x,y)∈R2,λ∈Λ,$${T_\lambda }(f;x,y) = \iint\limits_{{\mathbb{R}^2}}K_ ...
Uysal Gumrah
doaj +1 more source
Lp‐inverse theorem for modified beta operators
International Journal of Mathematics and Mathematical Sciences, Volume 2003, Issue 20, Page 1295-1303, 2003., 2003 We obtain a converse theorem for the linear combinations of modified beta operators whose weight function is the Baskakov operators. To prove our inverse theorem, we use the technique of linear approximating method, namely, Steklov mean.
Vijay Gupta +2 more
wiley +1 more source
Direct and strong converse inequalities for approximation with Fejér means
Demonstratio Mathematica, 2020 We present upper and lower estimates of the error of approximation of periodic functions by Fejér means in the Lebesgue spaces L2πp{L}_{2{\pi }}^{p}. The estimates are given in terms of a K-functional for 1≤p≤∞1\le p\le \infty and in terms of the first ...
Bustamante Jorge
doaj +1 more source
Rate of convergence on Baskakov‐Beta‐Bezier operators for bounded variation functions
International Journal of Mathematics and Mathematical Sciences, Volume 32, Issue 8, Page 471-479, 2002., 2002 We introduce a new sequence of linear positive operators Bn,α(f, x), which is the Bezier variant of the well‐known Baskakov Beta operators and estimate the rate of convergence of Bn,α(f, x) for functions of bounded variation. We also propose an open problem for the readers.
Vijay Gupta
wiley +1 more source
On the degree of approximation by Gauss Weierstrass integrals
International Journal of Mathematics and Mathematical Sciences, Volume 23, Issue 9, Page 645-649, 2000., 2000 We obtain the degree of approximation of functions belonging to class Lip(ψ(u, v); p), p > 1 using the Gauss Weierstrass integral of the double Fourier series of f(x, y).
Huzoor H. Khan, Govind Ram
wiley +1 more source