Results 81 to 90 of about 126,693 (204)
THREE-VARIABLE ALTERNATING TRIGONOMETRIC FUNCTIONS AND CORRESPONDING FOURIER TRANSFORMS
Acta Polytechnica, 2016 The common trigonometric functions admit generalizations to any higher dimension, the symmetric, antisymmetric and alternating ones. In this paper, we restrict ourselves to three dimensional generalization only, focusing on alternating case in detail ...
Agata Bezubik, Severin Pošta
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Property Preservation and Quality Measures in Meta-Models. [PDF]
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.
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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
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Approximation of classes B^ω_p,θ of periodic functions of several variables by polynomials with spectrum from cubic areas (in Ukrainian) [PDF]
Математичні Студії, 2011 We have obtained exact order estimates for error of approximation of classes B^ω_p,θ of periodic functions of several variables by trigonometric polynomials with spectrum from cubic areas.
S. A. Stasyuk
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Anti-Gaussian quadrature rule for trigonometric polynomials
, 2019 We investigate an anti-Gaussian quadrature rule with maximal trigonometric degree of exactness with respect to an even weight function on [π, π). Its error is equal in magnitude but of opposite sign to corresponding Gaussian formula.
Petrovic, Nevena +2 more
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Electronic Journal of Differential Equations, 2017 Let $A(\theta)$ non-constant and $B_j(\theta)$ for $j=0,1,2,3$ be real trigonometric polynomials of degree at most $\eta \ge 1$ in the variable x. Then the real equivariant trigonometric polynomial Abel differential equations $A(\theta) y' =B_1(\theta)
Claudia Valls
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An inequality for trigonometric polynomials [PDF]
Proceedings of the American Mathematical Society, 1982 Our purpose is to obtain in an elementary way a sharp estimate on the derivative of a trigonometric polynomial of degree ⩽
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Inequalities for Trigonometric Polynomials and Some Integral Means [PDF]
, 2001 Some inequalities associated with the Laplacian for trigonometric polynomials are given, which will be applied to investigate the behavior in approximation by trigonometric polynomials in higher dimensions and the best lower and upper estimates for some ...
Zhou, Xinlong +3 more
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A kind of identities related to Riemann zeta-function
Open MathematicsThe 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
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On approximation by trigonometric polynomials in Orlicz spaces
, 2012 Let T denote the interval [-?,?]. IN this paper, some theorems for approximation by trigonometric polynomials in the Orlicz space LM(T) are proved. Under certain conditions, we prove the existence of derivatives of functions belonging to the Orlicz space
Jafarov, Sadulla Z., Mamedkhanov, J.I.
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