Geodesic
$\varphi$-Strong Approximation of Functions by Trigonometric Polynomials
Matematičeskie zametki, Tome 102 (2017) no. 1, pp. 52-63

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The rate of $\varphi$-strong approximation of periodic functions by trigonometric polynomials constructed on the basis of interpolating polynomials with equidistant nodes is considered.
Mots-clés : Fourier–Lagrange series
Keywords: group of deviations, best approximation, Dirichlet kernel. 
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     author = {R. A. Lasuriya},
     title = {$\varphi${-Strong} {Approximation} of {Functions} by {Trigonometric} {Polynomials}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {52--63},
     publisher = {mathdoc},
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     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_102_1_a5/}
}
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R. A. Lasuriya. $\varphi$-Strong Approximation of Functions by Trigonometric Polynomials. Matematičeskie zametki, Tome 102 (2017) no. 1, pp. 52-63. http://geodesic.mathdoc.fr/item/MZM_2017_102_1_a5/