Results 201 to 210 of about 114,791,828 (221)
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Ukrainian Mathematical Journal, 2003
The upper bound for the best approximation by trigonometric polynomials \(E_n(f)\) of functions \(f\in L([-\pi,\pi]^m)\), \(m=2,3,\dots\), representable by multiple trigonometric series with a certain symmetry of coefficients and satisfying a multiple analogue of the Sidon-Telyakovskii conditions is obtained. Estimates of \(E_n(f)\) in terms of Fourier
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The upper bound for the best approximation by trigonometric polynomials \(E_n(f)\) of functions \(f\in L([-\pi,\pi]^m)\), \(m=2,3,\dots\), representable by multiple trigonometric series with a certain symmetry of coefficients and satisfying a multiple analogue of the Sidon-Telyakovskii conditions is obtained. Estimates of \(E_n(f)\) in terms of Fourier
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Some Tauberian theorems for (A)(C,α) summability method
Mathematical and Computer Modelling, 2010Yilmaz Erdem +2 more
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A summability factor theorem for a generalized absolute Cesàro summability
Mathematical and Computer Modelling, 2011Dansheng Yu
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Factors for generalized absolute Cesàro summability
Mathematical and Computer Modelling, 2011Huseyin Bor
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On Tauberian theorems for (A)(C,α) summability method
Applied Mathematics and Computation, 2011Yilmaz Erdem, Ibrahim Canak
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A note on strong matrix summability via ideals
Applied Mathematics Letters, 2012Pratulananda Das +2 more
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Statistical weighted B-summability and its applications to approximation theorems
Applied Mathematics and Computation, 2017Uğur Kadak, Naim Braha
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