Results 21 to 30 of about 11,921,625 (293)

A new note on factored infinite series and trigonometric Fourier series

Comptes Rendus. Mathématique, 2021
In this paper, we have proved two main theorems under more weaker conditions dealing with absolute weighted arithmetic mean summability factors of infinite series and trigonometric Fourier series.
Bor, Hüseyin
doaj   +1 more source

Generalized linear methods and convergence acceleration

Mathematical Modelling and Analysis, 2003
Several λ‐boundedness propositions for generalized linear methods A = (Ank ), while Ank are specially fixed linear bounded operators from Banach space X into X, are presented.
I. Tammeraid
doaj   +1 more source

Convergence acceleration and linear methods

Mathematical Modelling and Analysis, 2003
Two λ‐convergence propositions for linear methods A = (Ank ), while Ank are linear bounded operators from Banach space X into Banach space Y, are presented. These results are applied to study convergence acceleration of linear methods.
I. Tammeraid
doaj   +1 more source

On Products of Summability Methods [PDF]

Proceedings of the American Mathematical Society, 1952
1. At the recent International Congress I. M. Sheffer asked me the following question: Given a sequence {IS, }; form the sequence {an } of the Cesaro means of order a (a > 0) corresponding to { S, } . If S } is summable Abel, is it true that {a"} is also summable Abel? A more general question is: Suppose that A and B are two regular summability methods
openaire   +1 more source

Comparison of speeds of convergence in Riesz-type families of summability methods; pp. 70–80 [PDF]

Proceedings of the Estonian Academy of Sciences, 2008
We deal with Riesz-type families (see Proc. Estonian Acad. Sci. Phys. Math., 2002, 51, 18–34 and Acta Sci. Math. (Szeged), 2004, 70, 639–657) of summability methods Aα for converging functions and sequences.
Anna Šeletski, Anne Tali
doaj   +1 more source

Two Absolute Index-Summability Methods [PDF]

, 2016
In this paper we have established a relation between the Summability methods ...
Misra, U.K, Paikray, Susanta, Dash, M, Misra, M, Sarangi, S   +4 more
core   +1 more source

On absolute matrix summability methods [PDF]

, 2007
In this paper a theorem on | A, pn |k summability methods, which generalizes a theorem of Bor [2] on | N¯, pn |k summability methods, has been ...
Öğdük, H. N., H. N. Öğdük, Özarslan, H. S., Öğdük, Hatice Nedret, Özarslan, Hikmet, H. S. Özarslan   +5 more
core   +1 more source

A Link between Approximation Theory and Summability Methods via Four-Dimensional Infinite Matrices

Mathematics, 2021
In this study, we present a link between approximation theory and summability methods by constructing bivariate Bernstein-Kantorovich type operators on an extended domain with reparametrized knots.
Hari M. Srivastava, Khursheed J. Ansari, Faruk Özger, Zeynep Ödemiş Özger   +3 more
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On absolute normal double matrix summability methods [PDF]

, 2003
It is shown that, if T is a row finite nonnegative double summability matrix satisfying certain conditions, then |T|k summability is stronger than |N, pn|k summability, for k 1. As special summability methods T we consider weighted mean and double Cesaro,
Rhoades, B. E., B. E. Rhoades
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Absolute almost weighted summability methods

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019
In thepresent paper we introduce absolute almost weighted convergent series and treatwith the classical results of Bor [3-4] and also study some its relations tothe well known spaces.
Mehmet Ali Sarıgöl
doaj   +1 more source