Results 1 to 10 of about 174 (174)

On statistical convergence and strong Cesàro convergence by moduli for double sequences

open access: yesJournal of Inequalities and Applications, 2022
A remarkable result on summability states that the statistical convergence and the strong Cesàro convergence are closely connected. Given a modulus function f, we will establish that a double sequence that is f-strong Cesàro convergent is always f ...
Fernando León-Saavedra   +2 more
doaj   +1 more source

Ideals of square summable power series in several variables [PDF]

open access: yesProceedings of the American Mathematical Society, 1973
Let C ( z ) \mathcal {C}(z) be the Hilbert space of formal power series in z 1 , ⋯ , z r ( r ≧ 1 ) {z_1}, \cdots ,{z_r}(
openaire   +2 more sources

Parametric formal Gevrey asymptotic expansions in two complex time variable problems [PDF]

open access: yesOpuscula Mathematica
The analytic and formal solutions to a family of singularly perturbed partial differential equations in the complex domain involving two complex time variables are considered.
Guoting Chen   +2 more
doaj   +1 more source

Summability of power series in several variables, with applications to singular perturbation problems and partial differential equations [PDF]

open access: yesAnnales de la Faculté des sciences de Toulouse : Mathématiques, 2005
The author introduces a summability method of power series in several variables, and investigates applications to formal solutions of singular perturbation problems and partial differential equations. The sum of a formal power series \(\widehat{f}\) in finitely many variables \(z_1, z_2,\dots,z_m\) is expressed as \[ f(z_1, z_2, \ldots, z_m) = \int_0^{\
openaire   +2 more sources

On the Convergence of Absolute Summability for Functions of Bounded Variation in Two Variables

open access: yesAbstract and Applied Analysis, 2012
By adopting some new ideas, we obtain the estimates of an absolute convergence for the functions of the bounded variation in two variables. Our results generalize the related results of Humphreys and Bojanic (1999) and Wang and Yu (2003) from one ...
Ying Mei, Dansheng Yu
doaj   +1 more source

Korovkin-Type Approximation Theorems for Statistical Gauge Integrable Functions of Two Variables

open access: yesStats
In this work, we develop and investigate statistical extensions of gauge integrability and gauge summability for double sequences of functions of two real variables, formulated within the framework of deferred weighted means.
Hari Mohan Srivastava   +3 more
doaj   +1 more source

Validity and reliability study of the quality of recovery scale in Turkish. [PDF]

open access: yesTurk J Med Sci, 2023
Kiliç Ü   +3 more
europepmc   +1 more source

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