Results 91 to 100 of about 1,445 (159)

A New Look on Korovkin Theorem

Mediterranean Journal of Mathematics
AbstractGiving a sequence $$P=(P_{n})_{n}$$ P = ( P n ...
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On a version of the Korovkin theorem

Filomat
In this article, some of the main results of the paper ?An abstract version of the Korovkin theorem via A-summation proces? [2] are re-stated and proved. A Korovkin type theorem is given on a compact Hausdorff space.
Nihan Uygun, Hijaz Ahmad
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Statistical Deferred Weighted Riemann Summability and Fuzzy Approximation Theorems [PDF]

Sahand Communications in Mathematical Analysis
The notion of statistical convergence has fascinated many researchers due mainly to the fact that it is more general than the well-established hypothesis of ordinary (classical) convergence.
Priyadarsini Parida, Susanta Paikray, Bidu Jena   +2 more
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Automatic spectral density estimation for random fields on a lattice via bootstrap. [PDF]

We consider the nonparametric estimation of spectral densities for secondorder stationary random fields on a d-dimensional lattice. We discuss some drawbacks of standard methods and propose modified estimator classes with improved bias convergence rate ...
Vidal-Sanz, Jose M.
core  

Korovkin Type Approximation Theorem for Functions of Two Variables Through αβ−Statistical Convergence

Journal of Mathematical Sciences and Modelling, 2019
In this paper, we introduce the concepts of αβ−statistical convergence and strong αβ− summability of double sequences and investigate the relation between these two new concepts. Moreover, statistical convergence and αβ− statistical convergence of double
Selma Altundağ, Bayram Sözbir
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A Korovkin-type theorem for set-valued Hausdorff continuous functions

Le Matematiche, 1987
In this paper, we give a generalization of a Korovkin-type theorem for set-valued Hausdorff continuous functions (cf. [1] and [2]), by means of upper and lower envelopes.
Michele Campiti
doaj  

Approximation Theorems for Functions of Two Variables via σ-Convergence

Journal of Function Spaces, 2014
Çakan et al. (2006) introduced the concept of σ-convergence for double sequences. In this work, we use this notion to prove the Korovkin-type approximation theorem for functions of two variables by using the test functions 1, x, y, and x2+y2 and ...
Mohammed A. Alghamdi
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