Results 31 to 40 of about 1,242,956 (315)

Legendre Wavelet expansion of functions and their Approximations

open access: yesRatio Mathematica, 2019
In this paper , nine new Legendre wavelet estimators of functions having bounded third and fourth derivatives have been obtained.These estimators are new and best approximation in wavelet analysis.
Indra Bhan, Lal Shyam, Lal Shyam
doaj   +1 more source

Bounded Cosine Functions Close to Continuous Scalar Bounded Cosine Functions [PDF]

open access: yesIntegral Equations and Operator Theory, 2016
Let $(C(t))\_{t \in R}$ be a cosine function in a unital Banach algebra. We show that if $sup\_{t\in R}\Vert C(t)-cos(t)\Vert \textless{} 2$ for some continuous scalar bounded cosine function $(c(t))\_{t\in \R},$ then the closed subalgebra generated by $(C(t))\_{t\in R}$ is isomorphic to $\C^k$ for some positive integer $k.$ If, further, $sup\_{t\in \R}
openaire   +2 more sources

Boundedness and continuity of superposition operator on Er(p) and Fr(p) [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2002
Let X ∈ {Er(p)V , Fr(p)}, in this research, necessary and sufficient conditions are given for superposition operator to act from X into the space l1. Moreover, necessary and sufficient conditions are obtained for superposition operator acting from X into
Assa-aree Sama-ae
doaj  

The Sharp Bounds of the Third-Order Hankel Determinant for Certain Analytic Functions Associated with an Eight-Shaped Domain

open access: yesFractal and Fractional, 2022
The main focus of this research is to solve certain coefficient-related problems for analytic functions that are subordinated to a unique trigonometric function.
Lei Shi   +4 more
doaj   +1 more source

Boundary functions for bounded harmonic functions [PDF]

open access: yesTransactions of the American Mathematical Society, 1969
Let D be the open unit disk in the complex plane and let C be its boundary, the unit circle. If 4 E C, then by an arc at t we mean a simple arc y with one endpoint at 4 such that y { } ( D. In this paper we use the term boundazy function in the following sense.
openaire   +1 more source

lp,q-bounded sequences in function spaces

open access: yesJournal of Function Spaces and Applications, 2003
A sequence of measurable functions {fn} is called lp,q-bounded sequence ...
S. Ya. Novikov
doaj   +1 more source

Power bounded and power bounded below composition operators on Dirichlet Type spaces

open access: yesAIMS Mathematics, 2021
Motivated by [11,12], under some conditions on weighted function K, we investigated power bounded and power bounded below composition operators on Dirichlet Type spaces $ {\mathcal{D}_{K}} $.
Liu Yang, Ruishen Qian
doaj   +1 more source

Robust identification from band-limited data [PDF]

open access: yes, 1997
Consider the problem of identifying a scalar bounded-input/bounded-output stable transfer function from pointwise measurements at frequencies within a bandwidth.
Baratchart, L.   +3 more
core   +1 more source

Error Bounds for Fractional Integral Inequalities with Applications

open access: yesFractal and Fractional
Fractional calculus has been a concept used to obtain new variants of some well-known integral inequalities. In this study, our main goal is to establish the new fractional Hermite–Hadamard, and Simpson’s type estimates by employing a differentiable ...
Nouf Abdulrahman Alqahtani   +4 more
doaj   +1 more source

Bounded gaps between primes in number fields and function fields [PDF]

open access: yes, 2014
The Hardy--Littlewood prime $k$-tuples conjecture has long been thought to be completely unapproachable with current methods. While this sadly remains true, startling breakthroughs of Zhang, Maynard, and Tao have nevertheless made significant progress ...
Castillo, Abel   +4 more
core   +2 more sources

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