Results 21 to 30 of about 93,097 (321)

A new kind of Bernstein-Schurer-Stancu-Kantorovich-type operators based on q-integers

open access: yesJournal of Inequalities and Applications, 2017
Agrawal et al. (Boll. Unione Mat. Ital. 8:169-180, 2015) introduced a Stancu-type Kantorovich modification of the operators proposed by Ren and Zeng (Bull. Korean Math. Soc.
Ruchi Chauhan   +2 more
doaj   +1 more source

Boundary modulus of continuity and quasiconformal mappings

open access: bronzeAnnales Academiae Scientiarum Fennicae Mathematica, 2012
In [the reviewer and \textit{R. Näkki}, J. Lond. Math. Soc., II. Ser. 44, No. 2, 339--350 (1991; Zbl 0755.30026)] it was shown that if in a bounded domain \(D\) a quasiconformal mapping \(f:D \rightarrow \mathbb{R}^n\), continuous in \(\overline{D}\), satisfies \[ |f(x) - f(y)| \leq M|x-y|^{\alpha}\quad\text{for all}\quad x,y \in \partial D, \] then \[
Miloš Arsenović   +2 more
openalex   +5 more sources

Composition in Modulus Maps on Semigroups of Continuous Functions [PDF]

open access: yesTokyo Journal of Mathematics, 2021
For locally compact Hausdorff spaces $X$ and $Y$, and function algebras $A$ and $B$ on $X$ and $Y$, respectively, surjections $T:A \longrightarrow B$ satisfying norm multiplicative condition $\|Tf\, Tg\|_Y =\|fg\|_X$, $f,g\in A$, with respect to the supremum norms, and those satisfying $\||Tf|+|Tg|\|_Y=\||f|+|g|\|_X$ have been extensively studied ...
Jafarzadeh, Bagher, Sady, Fereshteh
openaire   +2 more sources

Approximation results on Dunkl generalization of Phillips operators via q-calculus

open access: yesAdvances in Difference Equations, 2019
The main purpose of this paper is to construct q-Phillips operators generated by Dunkl generalization. We prove several results of Korovkin type and estimate the order of convergence in terms of several moduli of continuity.
Md. Nasiruzzaman   +2 more
doaj   +1 more source

A quantitative modulus of continuity for the two-phase Stefan problem [PDF]

open access: yes, 2014
We derive the quantitative modulus of continuity $$ \omega(r)=\left[ p+\ln \left( \frac{r_0}{r} \right) \right]^{-\alpha (n,p)}, $$ which we conjecture to be optimal, for solutions of the $p$-degenerate two-phase Stefan problem.
Jose   +3 more
core   +1 more source

On the integral modulus of continuity of Fourier series [PDF]

open access: yesProceedings of the Indian Academy of Sciences - Section A, 1988
AbstractFor a wide class of sine trigonometric series we obtain an estimate for the integral modulus of continuity.
Ram, Babu, Kumari, Suresh
openaire   +2 more sources

On the Generalized Baskakov Durrmeyer Operators

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019
The main object of this paper is to construct Baskakov Durrmeyer type operators such that their construction depends on a function ρ. Using the weighted modulus of continuity, we show the uniform convergence of the operators. Moreover we obtain pointwise
Gülsüm Ulusoy
doaj   +1 more source

An adaptation theory for nonparametric confidence intervals [PDF]

open access: yes, 2004
A nonparametric adaptation theory is developed for the construction of confidence intervals for linear functionals. A between class modulus of continuity captures the expected length of adaptive confidence intervals.
Cai, T. Tony, Low, Mark G.
core   +3 more sources

Szász-Durrmeyer operators involving Boas-Buck polynomials of blending type

open access: yesJournal of Inequalities and Applications, 2017
The present paper introduces the Szász-Durrmeyer type operators based on Boas-Buck type polynomials which include Brenke type polynomials, Sheffer polynomials and Appell polynomials considered by Sucu et al. (Abstr. Appl. Anal. 2012:680340, 2012).
Manjari Sidharth   +2 more
doaj   +1 more source

ON AN ESTIMATE FOR THE MODULUS OF CONTINUITY OF A NONLINEAR INVERSE PROBLEM

open access: yesUral Mathematical Journal, 2015
A reverse time problem is considered for a semilinear parabolic equation. Two-sided estimates are obtained for the norms of values of a nonlinear operator in terms of the norms of values of the corresponding linear operator.
Elena V. Tabarintseva
doaj   +1 more source

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