Results 1 to 10 of about 86 (78)

Statistical deferred weighted B $\mathcal{B}$-summability and its applications to associated approximation theorems [PDF]

open access: yesJournal of Inequalities and Applications, 2018
The notion of statistical weighted B $\mathcal{B}$-summability was introduced very recently (Kadak et al. in Appl. Math. Comput. 302:80–96, 2017).
T. Pradhan   +3 more
doaj   +2 more sources

Tauberian theorems for weighted means of double sequences in intuitionistic fuzzy normed spaces [PDF]

open access: yesYugoslav Journal of Operations Research, 2022
We define weighted mean summability method of double sequences in intuitionistic fuzzy normed spaces(IFNS), and obtain necessary and sufficient Tauberian conditions under which convergence of double sequences in IFNS follows from their weighted mean ...
Narayan Mishra Lakshmi   +3 more
doaj   +1 more source

On the approximation of integrable functions by some special matrix means of Fourier series

open access: yesDemonstratio Mathematica, 2017
The results concerninig pointwise approximation and product of summability methods corresponding to the theorems of Xh. Z. Krasniqi [Poincare J. Anal. Appl., 2014, 1, 1-8] and W. Łenski and B. Szal [Math. Slovaca, 2016, 66(6), 1-12] are generalized. Some
Kranz Radosława, Rzepka Aleksandra
doaj   +1 more source

Approximation of Analytic Functions by Universal Vallee-Poussin Sums on the Chebyshev Polynomials

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2018
As it is known, Chebyshev polynomials provide the best uniform approach of a function. They are a special case of Faber polynomials. A. I. Shvay (1973) proved that the Vallee-Poussin sums are the best approach apparatus in comparison with the partial ...
L.K. Dodunova, A.A. Ageikin
doaj   +1 more source

On Pointwise Approximation of Conjugate Functions by Some Hump Matrix Means of Conjugate Fourier Series

open access: yesJournal of Function Spaces, 2015
The results generalizing some theorems on N, pnE, γ summability are shown. The same degrees of pointwise approximation as in earlier papers by weaker assumptions on considered functions and examined summability methods are obtained.
W. Łenski, B. Szal
doaj   +1 more source

Embeddings of a Multi-Weighted Anisotropic Sobolev Type Space

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы
Parameters such as various integral and differential characteristics of functions, smoothness properties of regions and their boundaries, as well as many classes of weight functions cause complex relationships and embedding conditions for multi-weighted
G.Sh. Iskakova   +2 more
doaj   +1 more source

Multivariate Kalman filtering for spatio-temporal processes. [PDF]

open access: yesStoch Environ Res Risk Assess, 2022
Ferreira G, Mateu J, Porcu E.
europepmc   +1 more source

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