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Real, complex and functional analysis
Approximation of discrete functions using special series by modified Meixner polynomials
R. M. Gadzhimirzaev Department of Mathematics and Computer Science, Dagestan Federal Research Center of RAS, 45, M.Gadzhieva str., Makhachkala, 367032, Russia
Abstract:
This article is devoted to the study of approximative properties of the special series by modified Meixner polynomials $M_{n,N}^\alpha(x)$ $(n=0, 1, \dots)$. For $\alpha>-1$ these polynomials form an orthogonal system on the grid $\Omega_{\delta}=\{0, \delta, 2\delta, \ldots\}$ with respect to the weight function $w(x)=e^{-x}\frac{\Gamma(Nx+\alpha+1)}{\Gamma(Nx+1)}$, where $\delta=\frac{1}{N}$, $N>0$. We obtained upper estimate on $\left[\frac{\theta_n}{2},\infty\right)$ for the Lebesgue function of partial sums of a special series, where $\theta_n=4n+2\alpha+2$.
Keywords:
Meixner polynomials, Fourier series, special series, Lebesgue function.
Received April 28, 2018, published March 12, 2020
Citation:
R. M. Gadzhimirzaev, “Approximation of discrete functions using special series by modified Meixner polynomials”, Sib. Èlektron. Mat. Izv., 17 (2020), 395–405
Linking options:
https://www.mathnet.ru/eng/semr1219 https://www.mathnet.ru/eng/semr/v17/p395
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Abstract page: | 235 | Full-text PDF : | 124 | References: | 9 |
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