Geodesic
Approximation with best order by Toeplitz-irregular methods of summability of Fourier series
Matematičeskie zametki, Tome 56 (1994) no. 6, pp. 117-121 
V. A. Baskakov. Approximation with best order by Toeplitz-irregular methods of summability of Fourier series. Matematičeskie zametki, Tome 56 (1994) no. 6, pp. 117-121. http://geodesic.mathdoc.fr/item/MZM_1994_56_6_a9/
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     author = {V. A. Baskakov},
     title = {Approximation with best order by {Toeplitz-irregular} methods of summability of {Fourier} series},
     journal = {Matemati\v{c}eskie zametki},
     pages = {117--121},
     year = {1994},
     volume = {56},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1994_56_6_a9/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

[1] Baskakov V. A., “Ob odnoi gipoteze P. P. Korovkina dlya neregulyarnykh metodov summirovaniya ryadov Fure”, Konstruktivnaya teoriya funktsii, Sofiya, 1980, 25–28 | Zbl

[2] Bari N. K., Trigonometricheskie ryady, Fizmatgiz, M., 1961