Results 91 to 100 of about 2,041 (214)

On the mean summability by Cesaro method of Fourier trigonometric series in two-weighted setting

Journal of Inequalities and Applications, 2006
The Cesaro summability of trigonometric Fourier series is investigated in the weighted Lebesgue spaces in a two-weight case, for one and two dimensions.
Kokilashvili V, Guven A
doaj  

Approximation by trigonometric polynomials in weighted rearrangement invariant spaces

, 2009
We investigate the approximation properties of trigonometric polynomials and prove some direct and inverse theorems for polynomial approximation in weighted rearrangement invariant ...
Daniyal M. Israfilov, Ali Guven, Israfilov, Daniyal M., Guven, Ali   +3 more
core   +2 more sources

A kind of identities related to Riemann zeta-function

Open Mathematics
The main purpose of this paper is to study a kind of identities related to Riemann zeta-function. We first construct a new sequence involving trigonometric function.
Chen Zhuoyu, Deng Changlin
doaj   +1 more source

Approximation of functions in Besov space by deferred Cesàro mean

Journal of Inequalities and Applications, 2016
In this paper we study the degree of approximation of functions (signals) in a Besov space by trigonometric polynomials using deferred Cesàro mean. We also deduce a few corollaries of our main result and compare them with the existing results.
Mradul Veer Singh, Madan Lal Mittal
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Inequalities for trigonometric polynomials

Journal of Approximation Theory, 1991
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Department of Mathematics, University of Florida, Gainesville, Florida 32611, U.S.A. ( host institution ), Varma, A.K   +1 more
openaire   +2 more sources

Approximation by trigonometric polynomials in variable exponent Morrey spaces

We investigate the direct and inverse theorems for trigonometric polynomials in the Morrey space Mp ( · ) , λ ( · ) with variable exponents. For this space, we obtain estimates of the K-functional in terms of the modulus of smoothness and the Bernstein ...
Ghorbanalizadeh A., Sawano Y., Guliyev V.S.   +2 more
core   +1 more source

On a Fejer-Riesz factorization of generalized trigonometric polynomials [PDF]

, 2020
Function theory on the unit disc proved key to a range of problems in statistics, probability theory, signal processing literature, and applications, and in this, a special place is occupied by trigonometric functions and the Fejer-Riesz theorem that non-
Lindquist, Anders, Georgiou, Tryphon T
core  

Property Preservation and Quality Measures in Meta-Models.

This thesis consists of three parts. Each part considers different sorts of meta-models. In the first part so-called Sandwich models are considered. In the second part Kriging models are considered. Finally, in the third part, (trigonometric) Polynomials
Siem, A.Y.D.
core   +1 more source

Multiple orthogonality in the space of trigonometric polynomials of semi-integer degree

, 2015
© 2015, University of Nis. All rights reserved. In this paper we consider multiple orthogonal trigonometric polynomials of semi-integer degree, which are necessary for constructing of an optimal set of quadrature rules with an odd number of nodes for ...
Stanić, Marija, Tomović, Tatjana
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Long Journey from Stevenson’s Formally Complex Hypergeometric Polynomials to Real-by-Definition Romanovski-Routh Polynomials

Axioms
The paper links Stevenson’s formally complex hypergeometric polynomials to the real-by-definition Romanovski-Routh (R-Routh) polynomials. The spectral problem for Stevenson’s second-order normal ordinary differential equation (NODE) was formulated in ...
Gregory Natanson
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