Results 21 to 30 of about 1,241,136 (285)

On bounded functions with bounded 𝑛th differences [PDF]

open access: yesProceedings of the American Mathematical Society, 1959
We consider real valued functions f defined in a closed interval I (bounded or unbounded), with nth differences $$ \Delta _{h}^{n}f(x) = \sum\limits_{i} {{{{( - 1)}}^{{n - i}}}} \left( {\begin{array}{*{20}{c}} n \\ i \\ \end{array} } \right)f(x + ih) $$ bounded for some fixed n.
openaire   +2 more sources

Extending the Set of Quadratic Exponential Vectors [PDF]

open access: yes, 2008
We extend the square of white noise algebra over the step functions on R to the test function space of bounded square-integrable functions on R^d, and we show that in the Fock representation the exponential vectors exist for all test functions bounded by
Accardi, Luigi   +2 more
core   +2 more sources

Entire Bivariate Functions of Exponential Type II

open access: yesМатематичні Студії, 2023
Let $f(z_{1},z_{2})$ be a bivariate entire function and $C$ be a positive constant. If $f(z_{1},z_{2})$ satisfies the following inequality for non-negative integer $M$, for all non-negative integers $k,$ $l$ such that $k+l\in\{0, 1, 2, \ldots, M\}$, for ...
A. Bandura, F. Nuray
doaj   +1 more source

Functions with bounded spectrum [PDF]

open access: yesTransactions of the American Mathematical Society, 1995
Summary: Let \(0< p\leq \infty\), \(f(x)\in L_p(\mathbb{R}^n)\), and \(\text{supp } Ff\) be bounded, where \(F\) is the Fourier transform. We prove in this paper that the sequence \(|D^\alpha f|^{1/|\alpha|}_p\), \(\alpha\geq 0\), has the same behavior as the sequence \(\sup_{\xi\in \text{supp }Ff} |\xi^{\alpha}|^{1/|\alpha|}\), \(\alpha\geq 0\).
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Estimate of the squeezing function for a class of bounded domains [PDF]

open access: yes, 2017
We construct a class of bounded domains, on which the squeezing function is not uniformly bounded from below near a smooth and pseudoconvex boundary point.Comment: 7 pages; corrected errors and improved presentation; to appear in Math ...
Fornaess, John Erik, Rong, Feng
core   +2 more sources

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

On Almost Bounded Functions [PDF]

open access: yesTransactions of the American Mathematical Society, 1976
New results are presented with regard to the “almost bounded functions” introduced by Goodman [2], including a theorem which contains a proof of Goodman’s conjecture for a particular case.
openaire   +2 more sources

Lebesgue type inequalities for quasi-greedy bases [PDF]

open access: yes, 2012
We show that for quasi-greedy bases in real or complex Banach spaces the error of the thresholding greedy algorithm of order N is bounded by the best N- term error of approximation times a function of N which depends on the democracy functions and the ...
Garrigós, Gustavo   +2 more
core   +2 more sources

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

On Bounded Analytic Functions [PDF]

open access: yesProceedings of the American Mathematical Society, 1950
The objective of this paper is to give an alternative derivation of results on bounded analytic functions recently obtained by Ahlfors [1] and Garabedian [2].1 While it is admitted that the main idea to be used is more in the nature of a lucky guess than of a method, it will be found that the gain in brevity and simplicity of the argument is ...
openaire   +2 more sources

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